Interacciones de Levonorgestrel

Concomitant use of combined hormonal contraceptives ( 4.1 ) (etiqueta de Ácido tranexámico, Contraindicaciones)

It has not been established if there is a pharmacokinetic interaction between acitretin and combined oral contraceptives. (etiqueta de Acitretina, Advertencia en recuadro)

…Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital… (etiqueta de Levonorgestrel, Contraindicaciones)

…Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital… (etiqueta de Levonorgestrel, Contraindicaciones)

…Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital… (etiqueta de Levonorgestrel, Contraindicaciones)

CARDIOVASCULAR AND OTHER RISKS Estrogens and progestins should not be used for the prevention of cardiovascular disease [see WARNINGS , Cardiovascular disorders ]. (etiqueta de Estradiol, Advertencia en recuadro)

…Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital… (etiqueta de Levonorgestrel, Contraindicaciones)

…Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital… (etiqueta de Levonorgestrel, Contraindicaciones)

Adding a progestin to estrogen therapy has been shown to reduce the risk of endometrial hyperplasia, which may be a precursor to endometrial cancer. (etiqueta de Estrógenos conjugados, Advertencia en recuadro)

(See WARNINGS, Malignant Neoplasms, Endometrial Cancer. ) CARDIOVASCULAR AND OTHER RISKS Estrogens with or without progestins should not be used for the prevention of cardiovascular disease. (etiqueta de Estrógenos esterificados y metiltestosterona, Advertencia en recuadro)

…Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital… (etiqueta de Levonorgestrel, Contraindicaciones)

Women taking estrogen-containing oral contraceptives may be at increased risk of becoming pregnant while on griseofulvin (see also PRECAUTIONS, Drug Interactions ) . (etiqueta de Griseofulvina, Contraindicaciones)

La hierba de San Juan (hipérico) puede hacer que las píldoras anticonceptivas sean menos eficaces. (NCCIH, St. John's Wort)

…Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital… (etiqueta de Levonorgestrel, Contraindicaciones)

…Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital… (etiqueta de Levonorgestrel, Contraindicaciones)

…Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital… (etiqueta de Levonorgestrel, Contraindicaciones)

…Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital… (etiqueta de Levonorgestrel, Contraindicaciones)

Sensitive CYP3A substrates including hormonal contraceptives: Avoid concomitant use with substrates that have narrow therapeutic index. (etiqueta de Mitapivat, Interacciones medicamentosas)

Hormonal contraceptives: Avoid concomitant use with LYSODREN. (etiqueta de Mitotano, Interacciones medicamentosas)

…Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital… (etiqueta de Levonorgestrel, Contraindicaciones)

…Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital… (etiqueta de Levonorgestrel, Contraindicaciones)

…Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital… (etiqueta de Levonorgestrel, Contraindicaciones)

…Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital… (etiqueta de Levonorgestrel, Contraindicaciones)

…Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital… (etiqueta de Levonorgestrel, Contraindicaciones)

…Precautions ( 5.4 )] • Postpartum endometritis or infected abortion in the past 3 months • Known or suspected uterine or cervical malignancy • Known or suspected breast cancer or other progestin-sensitive cancer, now or in the past • Uterine bleeding of unknown etiology • Untreated acute cervicitis or vaginitis, including bacterial vaginosis or other lower genital… (etiqueta de Levonorgestrel, Contraindicaciones)

Moderate or Weak CYP1A2 Inhibitors Concomitant use of Zanaflex with moderate or weak CYP1A2 inhibitors (e.g., zileuton, antiarrhythmics [amiodarone, mexiletine, propafenone, and verapamil], cimetidine, famotidine, oral contraceptives, acyclovir, and ticlopidine) should be avoided. (etiqueta de Tizanidina, Interacciones medicamentosas)

John's Wort (CYP450 inducer; P-gp inducer) Significantly Reduced Contraindicated Oral Contraceptives containing ethinyl estradiol and norethindrone (CYP2C19 Inhibition) Increased Monitoring for adverse reactions and toxicity related to voriconazole is recommended for concomitant administration with oral contraceptives. (etiqueta de Voriconazol, Interacciones medicamentosas)

Drugs Affecting Lipid Metabolism Estrogens, oral contraceptives, and clofibrate (and perhaps other lipid-lowering drugs) increase hepatic cholesterol secretion and encourage cholesterol gallstone formation and hence may counteract the effectiveness of URSO 250 and URSO Forte. (etiqueta de Ácido ursodesoxicólico, Interacciones medicamentosas)

Aspirin, carbapenem antibiotics, estrogen-containing hormonal contraceptives: Monitoring of valproate concentrations is recommended (7.1) (etiqueta de Ácido valproico, Interacciones medicamentosas)

Examples: Thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium channel blocking drugs and isoniazid Alogliptin Cytochrome (CYP) P450, CYP-Substrates or Inhibitors Clinical Impact: Insulin Secretagogues and Insulin Insulin and insulin secretagogues… (etiqueta de Alogliptina y metformina, Interacciones medicamentosas)

Estrogen Estrogen containing oral contraceptives decrease theophylline clearance in a dose-dependent fashion. (etiqueta de Aminofilina, Interacciones medicamentosas)

• Oral Contraceptives: May increase plasma levels of norethindrone and ethinyl estradiol; consider this effect when selecting an oral contraceptive ( 7.5 ). (etiqueta de Amlodipino y atorvastatina, Interacciones medicamentosas)

Amoxicillin may reduce the efficacy of oral contraceptives. (etiqueta de Amoxicilina, Interacciones medicamentosas)

Amoxicillin and Clavulanate Potassium Extended Release Tablets may reduce efficacy of oral contraceptives. (etiqueta de Amoxicilina y ácido clavulánico, Interacciones medicamentosas)

Oral Contraceptives : May be less effective and increased breakthrough bleeding may occur. (etiqueta de Ampicilina, Interacciones medicamentosas)

…Skyla with caution after careful assessment if any of the following conditions exist, and consider removal of the system if any of them arise during use: • Coagulopathy or use of anticoagulants • Migraine, focal migraine with asymmetrical visual loss or other symptoms indicating transient cerebral ischemia • Exceptionally severe headache • Marked increase of… (etiqueta de Levonorgestrel, Advertencias y precauciones)

Hormonal Contraceptives : Efficacy of contraceptives may be reduced during and for 28 days following administration of aprepitant. (etiqueta de Aprepitant, Advertencias y precauciones)

…Skyla with caution after careful assessment if any of the following conditions exist, and consider removal of the system if any of them arise during use: • Coagulopathy or use of anticoagulants • Migraine, focal migraine with asymmetrical visual loss or other symptoms indicating transient cerebral ischemia • Exceptionally severe headache • Marked increase of… (etiqueta de Levonorgestrel, Advertencias y precauciones)

Hormonal contraceptives: ethinyl estradiol and norgestimate or norethindrone ↓ ethinyl estradiol ↑ norgestimate c ↑ ethinyl estradiol ↑ norethindrone d Use caution if considering coadministration of oral contraceptives with REYATAZ or REYATAZ with ritonavir. (etiqueta de Atazanavir, Interacciones medicamentosas)

• Oral Contraceptives: May increase plasma levels of norethindrone and ethinyl estradiol; consider this effect when selecting an oral contraceptive ( 7.3 ). (etiqueta de Atorvastatina, Interacciones medicamentosas)

…Skyla with caution after careful assessment if any of the following conditions exist, and consider removal of the system if any of them arise during use: • Coagulopathy or use of anticoagulants • Migraine, focal migraine with asymmetrical visual loss or other symptoms indicating transient cerebral ischemia • Exceptionally severe headache • Marked increase of… (etiqueta de Levonorgestrel, Advertencias y precauciones)

Hormonal contraceptives: TRACLEER use decreases contraceptive exposure and reduces effectiveness ( 7.2 ). (etiqueta de Bosentán, Interacciones medicamentosas)

Drugs without Clinically Significant Interactions with Cabotegravir Based on drug interaction study results, the following drugs can be coadministered with cabotegravir without a dose adjustment: etravirine, midazolam, oral contraceptives containing levonorgestrel and ethinyl estradiol, rifabutin, and rilpivirine [see Clinical Pharmacology ( 12.3 )] . (etiqueta de Cabotegravir, Interacciones medicamentosas)

EQUETRO can reduce the effectiveness of hormonal contraceptives. (etiqueta de Carbamazepina, Advertencias y precauciones)

Oral Contraceptives: Effectiveness of hormonal oral contraceptives may be reduced when administered concomitantly with XCOPRI. (etiqueta de Cenobamato, Interacciones medicamentosas)

…itraconazole clarithromycin Amiodarone verapamil ketoconazole erythromycin Bromocriptine voriconazole quinupristin/ dalfopristin colchicine danazol imatinib metoclopramide nefazodone oral contraceptives HIV Protease Inhibitors The HIV protease inhibitors (e.g., indinavir, nelfinavir, ritonavir, and saquinavir) are known to inhibit cytochrome P-450 3A and thus could… (etiqueta de Ciclosporina, Interacciones medicamentosas)

Plasma cholinesterase activity may be decreased by chronic administration of certain monoamine oxidase inhibitors, oral contraceptives, glucocorticoids, antimyasthenics (neostigmine), cyclophosphamide, and possibly thiotepa. (etiqueta de Cocaína, Interacciones medicamentosas)

Concomitant use with colesevelam hydrochloride may decrease the exposure of the following drugs: Drugs with a narrow therapeutic index (e.g., cyclosporine), phenytoin, thyroid hormone replacement therapy, warfarin, oral contraceptives containing ethinyl estradiol and norethindrone, olmesartan medoxomil, and sulfonylureas (glimepiride, glipizide, glyburide). (etiqueta de Colesevelam, Interacciones medicamentosas)

Drug Interactions Cholestyramine for Oral Suspension USP may delay or reduce the absorption of concomitant oral medication such as phenylbutazone, warfarin, thiazide diuretics (acidic), or propranolol (basic), as well as tetracycline, penicillin G, phenobarbital, thyroid and thyroxine preparations, estrogens and progestins, and digitalis. (etiqueta de Colestiramina, Interacciones medicamentosas)

…Skyla with caution after careful assessment if any of the following conditions exist, and consider removal of the system if any of them arise during use: • Coagulopathy or use of anticoagulants • Migraine, focal migraine with asymmetrical visual loss or other symptoms indicating transient cerebral ischemia • Exceptionally severe headache • Marked increase of… (etiqueta de Levonorgestrel, Advertencias y precauciones)

Hormonal contraceptives : Effective alternative (non-hormonal) contraceptive method or a barrier method of contraception is recommended [see Use in Specific Populations (8.3) ] . ethinyl estradiol, norethindrone, drospirenone ↓ ethinyl estradiol ↓ norethindrone drospirenone: effects unknown For co-administration with drospirenone, clinical monitoring is recommended… (etiqueta de Darunavir, Interacciones medicamentosas)

Hormonal contraceptives: Additional or alternative (non-hormonal) forms of contraception should be considered when estrogen-containing contraceptives are co-administered with PREZCOBIX or PREZCOBIX PED [see Use in Specific Populations (8.3) ] . drospirenone/ethinylestradiol ↑ drospirenone ↓ ethinylestradiol For co-administration with drospirenone, clinical monitoring… (etiqueta de Darunavir y cobicistat, Interacciones medicamentosas)

…budesonide, buspirone, conivaptan, cyclosporine, darifenacin, darunavir, dasatinib, dihydroergotamine, dronedarone, eletriptan, eplerenone, ergotamine, everolimus, felodipine, fentanyl, hormonal contraceptive agents, indinavir, fluticasone, lopinavir, lovastatin, lurasidone, maraviroc, midazolam, nisoldipine, pimozide, quetiapine, quinidine, saquinavir, sildenafil,… (etiqueta de Deferasirox, Interacciones medicamentosas)

Estrogens, Including Oral Contraceptives Estrogens may decrease the hepatic metabolism of certain corticosteroids and increase exposures, which may increase the risk of adverse reactions [see Warnings and Precautions ( ‎5 ) and Adverse Reactions (‎ 6 )] . (etiqueta de Dexametasona, Interacciones medicamentosas)

Aspirin, carbapenem antibiotics, estrogen-containing hormonal contraceptives, methotrexate: Monitoring of valproate concentrations is recommended ( 7.1 ) (etiqueta de Divalproato de sodio (valproato), Interacciones medicamentosas)

…following drugs can be coadministered with dolutegravir without a dose adjustment: atazanavir/ritonavir, darunavir/ritonavir, elbasvir/grazoprevir, methadone, midazolam, omeprazole, oral contraceptives containing norgestimate and ethinyl estradiol, prednisone, rifabutin, rilpivirine, sofosbuvir/velpatasvir, and tenofovir [see Clinical Pharmacology ( 12.3 )] . (etiqueta de Dolutegravir, Interacciones medicamentosas)

…Skyla with caution after careful assessment if any of the following conditions exist, and consider removal of the system if any of them arise during use: • Coagulopathy or use of anticoagulants • Migraine, focal migraine with asymmetrical visual loss or other symptoms indicating transient cerebral ischemia • Exceptionally severe headache • Marked increase of… (etiqueta de Levonorgestrel, Advertencias y precauciones)

For patients with CF taking hormonal contraceptives who develop rash, consider interrupting TRIKAFTA and hormonal contraceptives. (etiqueta de Elexacaftor, tezacaftor e ivacaftor, Interacciones medicamentosas)

Hormonal Contraceptives: drospirenone/ethinyl estradiol levonorgestrel norgestimate/ethinyl estradiol ↑ drospirenone ↑ norgestimate ↑ levonorgestrel ↓ ethinyl estradiol Additional or alternative non-hormonal forms of contraception should be considered when estrogen based contraceptives are coadministered with GENVOYA. (etiqueta de Elvitegravir, cobicistat, emtricitabina y tenofovir, Interacciones medicamentosas)

…Skyla with caution after careful assessment if any of the following conditions exist, and consider removal of the system if any of them arise during use: • Coagulopathy or use of anticoagulants • Migraine, focal migraine with asymmetrical visual loss or other symptoms indicating transient cerebral ischemia • Exceptionally severe headache • Marked increase of… (etiqueta de Levonorgestrel, Advertencias y precauciones)

Hormonal Contraceptives: APTIOM may decrease the effectiveness of hormonal contraceptives. (etiqueta de Eslicarbazepina, Interacciones medicamentosas)

• Women taking DUAVEE should not take progestins, additional estrogens or additional estrogen agonist/antagonists ( 5.1 ) (etiqueta de Estrógenos conjugados y bazedoxifeno, Advertencias y precauciones)

Effects of Felbatol ® on Low-Dose Combination Oral Contraceptives A group of 24 nonsmoking, healthy white female volunteers established on an oral contraceptive regimen containing 30 µg ethinyl estradiol and 75 µg gestodene for at least 3 months received 2400 mg/day of felbamate from midcycle (day 15) to midcycle (day 14) of two consecutive oral contraceptive… (etiqueta de Felbamato, Interacciones medicamentosas)

Warfarin Increased and decreased PT/INR responses have been reported when phenytoin is coadministered with warfarin Other Corticosteroids, doxycycline, estrogens, furosemide, oral contraceptives, paroxetine, quinidine, rifampin, sertraline, theophylline, and vitamin D Drugs whose level is decreased by phenytoin Anticoagulants Apixaban, dabigatran, edoxaban, rivaroxaban… (etiqueta de Fenitoína, Interacciones medicamentosas)

Oral Contraceptives Clinical Impact Co-administration of multiple-dose phentermine and topiramate extended-release capsules 15 mg/92 mg once daily with a single dose of oral contraceptive containing 35 µg ethinyl estradiol (estrogen component) and 1 mg norethindrone (progestin component), in obese otherwise healthy volunteers, decreased the exposure of ethinyl… (etiqueta de Fentermina y topiramato, Interacciones medicamentosas)

Weak CYP3A4 Inhibitors Examples Oral contraceptives, cimetidine, fluoxetine, ginkgo, ranitidine Clinical Implications The concomitant use of ADDYI with multiple weak CYP3A4 inhibitors may increase the risk of adverse reactions. (etiqueta de Flibanserina, Interacciones medicamentosas)

There were no relevant effects on hormone level in the 50 mg fluconazole study, while at 200 mg daily, the AUCs of ethinyl estradiol and levonorgestrel were increased 40% and 24%, respectively. (etiqueta de Fluconazol, Interacciones medicamentosas)

…Skyla with caution after careful assessment if any of the following conditions exist, and consider removal of the system if any of them arise during use: • Coagulopathy or use of anticoagulants • Migraine, focal migraine with asymmetrical visual loss or other symptoms indicating transient cerebral ischemia • Exceptionally severe headache • Marked increase of… (etiqueta de Levonorgestrel, Advertencias y precauciones)

Hormonal Contraceptives: Efficacy of contraceptives may be reduced during treatment and for 1 month following administration of the last dose of either fosaprepitant or oral aprepitant. (etiqueta de Fosaprepitant, Advertencias y precauciones)

Other Corticosteroids, doxycycline, estrogens, furosemide, oral contraceptives, paroxetine, quinidine, rifampin, sertraline, theophylline, and vitamin D Drugs whose level is decreased by phenytoin Anticoagulants Apixaban, dabigatran, edoxaban, rivaroxaban Antiepileptic drugs The effect of phenytoin on phenobarbital, valproic acid and sodium valproate serum levels… (etiqueta de Fosfenitoína, Interacciones medicamentosas)

Oral Contraceptive Based on AUC and half-life, multiple-dose pharmacokinetic profiles of norethindrone and ethinyl estradiol following administration of tablets containing 2.5 mg of norethindrone acetate and 50 mcg of ethinyl estradiol were similar with and without coadministration of gabapentin (400 mg three times a day; N=13). (etiqueta de Gabapentina, Interacciones medicamentosas)

…somatropin, protease inhibitors, atypical antipsychotic medications (e.g., olanzapine and clozapine), barbiturates, diazoxide, laxatives, rifampin, thiazides and other diuretics, corticosteroids, phenothiazines, thyroid hormones, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics (e.g., epinephrine, albuterol, terbutaline), and isoniazid. (etiqueta de Glimepirida, Interacciones medicamentosas)

…GLUCOTROL XL, leading to worsening glycemic control: atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g., albuterol, epinephrine, terbutaline),… (etiqueta de Glipizida, Interacciones medicamentosas)

…Skyla with caution after careful assessment if any of the following conditions exist, and consider removal of the system if any of them arise during use: • Coagulopathy or use of anticoagulants • Migraine, focal migraine with asymmetrical visual loss or other symptoms indicating transient cerebral ischemia • Exceptionally severe headache • Marked increase of… (etiqueta de Levonorgestrel, Advertencias y precauciones)

…Glucose Lowering Effect of Insulin Aspart Drugs: Atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g., albuterol, epinephrine, terbutaline),… (etiqueta de Insulina asparta, Interacciones medicamentosas)

…Glucose Lowering Effect of Insulin Degludec Drugs: Atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g., albuterol, epinephrine, terbutaline),… (etiqueta de Insulina degludec, Interacciones medicamentosas)

…Blood Glucose Lowering Effect of LEVEMIR Drugs: Atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g., albuterol, epinephrine, terbutaline),… (etiqueta de Insulina detemir, Interacciones medicamentosas)

…Lowering Effect of Insulin Glargine-yfgn Drugs: Atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g., albuterol, epinephrine, terbutaline),… (etiqueta de Insulina glargina, Interacciones medicamentosas)

…Blood Glucose Lowering Effect of LYUMJEV Drugs: Atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g., albuterol, epinephrine, terbutaline),… (etiqueta de Insulina lispro, Interacciones medicamentosas)

Decrease in levonorgestrel component by 19%. (etiqueta de Lamotrigina, Interacciones medicamentosas)

Teriflunomide may increase exposure of ethinylestradiol and levonorgestrel. (etiqueta de Leflunomida, Interacciones medicamentosas)

…Drugs That May Alter T 4 and Triiodothyronine (T 3 ) Serum Transport Without Effecting Free Thyroxine (FT 4 ) Concentration (Euthyroidism) Drug or Drug Class Effect Clofibrate Estrogen-containing oral contraceptives Estrogens (oral) Heroin/Methadone 5-Fluorouracil Mitotane Tamoxifen These drugs may increase serum thyroxine-binding globulin (TBG) concentration. (etiqueta de Levotiroxina, Interacciones medicamentosas)

Estrogen, Oral Contraceptives — Estrogens tend to increase serum thyroxine-binding globulin (TBg). (etiqueta de Levotiroxina y liotironina, Interacciones medicamentosas)

Table 2: Drugs That May Alter Triiodothyronine (T3) Serum Transport Without Affecting Free Thyroxine (FT4) Concentration (Euthyroidism) Drug or Drug Class Effect Clofibrate Estrogen-containing oral contraceptives Estrogens (oral) Heroin/Methadone 5-Fluorouracil Mitotane Tamoxifen These drugs may increase serum thyroxine-binding globulin (TBG) concentration. (etiqueta de Liotironina, Interacciones medicamentosas)

Careful titration may then be considered based on LDL-C response and safety/tolerability to a maximum recommended dosage of 30 mg daily except when coadministered with oral contraceptives, in which case the maximum recommended lomitapide dosage is 40 mg daily [see Dosage and Administration (2.3) and Drug Interactions (7.2) ]. (etiqueta de Lomitapida, Advertencias y precauciones)

Advise females of reproductive potential to use an effective non-hormonal method of contraception, since LORBRENA can render hormonal contraceptives ineffective, during treatment with LORBRENA and for at least 6 months after the final dose. (etiqueta de Lorlatinib, Advertencias y precauciones)

Estrogens, including oral contraceptives : Estrogens may decrease the hepatic metabolism of certain corticosteroids, thereby increasing their effect. (etiqueta de Metilprednisolona, Interacciones medicamentosas)

Mycophenolate mofetil may reduce effectiveness of oral contraceptives. (etiqueta de Micofenolato, Interacciones medicamentosas)

When these oral contraceptives are used for hormonal regulation during nevirapine therapy, the therapeutic effect of the hormonal therapy should be monitored. (etiqueta de Nevirapina, Interacciones medicamentosas)

Advise women taking oral hormonal contraceptives experiencing vomiting, diarrhea, or other conditions where the drug absorption may be reduced to use alternative highly effective contraception. (etiqueta de Nintedanib, Advertencias y precauciones)

Hormonal contraceptive ethinyl estradiol ↓ ethinyl estradiol An additional, non-hormonal method of contraception should be considered during the 5 days of PAXLOVID treatment and until one menstrual cycle after stopping PAXLOVID. (etiqueta de Nirmatrelvir y ritonavir, Interacciones medicamentosas)

Levonorgestrel Clinical Impact: Concomitant administration of MYCAPSSA with levonorgestrel decreases levonorgestrel bioavailability [see Clinical Pharmacology (‎12.3) ] . (etiqueta de Octreotida, Interacciones medicamentosas)

Oral Contraceptive: TRILEPTAL may decrease the effectiveness of hormonal contraceptives ( 7.3 ) (etiqueta de Oxcarbazepina, Interacciones medicamentosas)

Contraceptives With concomitant use, FYCOMPA at a dose of 12 mg per day reduced levonorgestrel exposure by approximately 40% [see Clinical Pharmacology (12.3) ] . (etiqueta de Perampanel, Interacciones medicamentosas)

…somatropin, protease inhibitors, atypical antipsychotic medications (e.g., olanzapine and clozapine), barbiturates, diazoxide, laxatives, rifampin, thiazides and other diuretics, corticosteroids, phenothiazines, thyroid hormones, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics (e.g., epinephrine, albuterol, terbutaline), and isoniazid. (etiqueta de Pioglitazona y glimepirida, Interacciones medicamentosas)

Sensitive CYP3A4 Substrates (including hormonal contraceptives): WAKIX may reduce effectiveness of sensitive CYP3A4 substrates. (etiqueta de Pitolisant, Interacciones medicamentosas)

Estrogens, including oral contraceptives: Estrogens may decrease the hepatic metabolism of certain corticosteroids thereby increasing their effect. (etiqueta de Prednisolona, Interacciones medicamentosas)

Estrogens, Including Oral Contraceptives Estrogens may decrease the hepatic metabolism of certain corticosteroids, thereby increasing their effect. (etiqueta de Prednisona, Interacciones medicamentosas)

Oral Contraceptives (Estrogen, Progestin) In 7 healthy females who were using single-ingredient progestin or combination estrogen-containing oral contraceptives, the pharmacokinetic parameters of a single 600 mg dose of quinine sulfate were not altered in comparison to those observed in 7 age-matched female control subjects not using oral contraceptives. (etiqueta de Quinina, Interacciones medicamentosas)

History of Hypertriglyceridemia when Treated with Estrogens Limited clinical data suggest that some women with a history of marked hypertriglyceridemia (>5.6 mmol/L or >500 mg/dL) in response to treatment with oral estrogen or estrogen plus progestin may develop increased levels of triglycerides when treated with EVISTA. (etiqueta de Raloxifeno, Advertencias y precauciones)

Telaprevir Decrease AUC by 92% Systemic Hormonal Contraceptives Prevention or Management: Advise patients to change to non-hormonal methods of birth control during rifampin therapy Estrogens Decrease exposure Progestins Anticonvulsants Phenytoin Administered with rifampin 450 mg daily Decrease exposure Antiarrhythmics Disopyramide Decrease exposure Mexiletine… (etiqueta de Rifampicina, Interacciones medicamentosas)

Hormonal Contraceptives PRIFTIN may reduce the effectiveness of hormonal contraceptives. (etiqueta de Rifapentina, Interacciones medicamentosas)

The concomitant use of strong or moderate CYP1A2 inhibitors (e.g., ciprofloxacin, enoxacin, fluvoxamine, methoxsalen, mexiletine, oral contraceptives, thiabendazole, vemurafenib, zileuton) with TIGLUTIK may increase the risk of TIGLUTIK - associated adverse reactions [see Clinical Pharmacology (12.3) ]. (etiqueta de Riluzol, Interacciones medicamentosas)

Oral Contraceptives or Patch Contraceptives: ethinyl estradiol ↓ ethinyl estradiol Alternate methods of contraception should be considered. (etiqueta de Ritonavir, Interacciones medicamentosas)

…Skyla with caution after careful assessment if any of the following conditions exist, and consider removal of the system if any of them arise during use: • Coagulopathy or use of anticoagulants • Migraine, focal migraine with asymmetrical visual loss or other symptoms indicating transient cerebral ischemia • Exceptionally severe headache • Marked increase of… (etiqueta de Levonorgestrel, Advertencias y precauciones)

Oral Contraceptives Containing Gestodene and Ethinyl Estradiol The co-administration of DALIRESP (500 mcg) with oral contraceptives containing gestodene and ethinyl estradiol may increase roflumilast systemic exposure and may result in increased side effects. (etiqueta de Roflumilast, Interacciones medicamentosas)

Oral Contraceptives: Decreased efficacy possibly resulting in pregnancy; use a different or additional form of contraception. (etiqueta de Subcitrato de bismuto, metronidazol y tetraciclina, Interacciones medicamentosas)

Therefore, the administration of a bolus dose of BRIDION is considered to be equivalent to missing dose(s) of oral contraceptives containing an estrogen or progestogen. (etiqueta de Sugammadex, Interacciones medicamentosas)

The neuromuscular blocking effect of succinylcholine may be enhanced by drugs that reduce plasma cholinesterase activity (e.g., chronically administered oral contraceptives, glucocorticoids, or certain monoamine oxidase inhibitors) or by drugs that irreversibly inhibit plasma cholinesterase [see Warnings and Precautions (5.9) ]. (etiqueta de Suxametonio (succinilcolina), Interacciones medicamentosas)

Risk of Drug Interactions with Certain Hormonal Contraceptives JOURNAVX-treated patients taking concomitant hormonal contraceptives containing progestins other than levonorgestrel and norethindrone should use additional nonhormonal contraceptives (such as condoms) or use alternative contraceptives (e.g., a combined oral contraceptive containing ethinyl estradiol… (etiqueta de Suzetrigina, Advertencias y precauciones)

Estrogen Estrogen containing oral contraceptives decrease theophylline clearance in a dose-dependent fashion. (etiqueta de Teofilina, Interacciones medicamentosas)

Teriflunomide may increase exposure of ethinylestradiol and levonorgestrel. (etiqueta de Teriflunomida, Interacciones medicamentosas)

Advise patients using oral hormonal contraceptives to switch to a non-oral contraceptive method, or add a barrier method of contraception for 4 weeks after initiation with ZEPBOUND and for 4 weeks after each dose escalation. (etiqueta de Tirzepatida, Interacciones medicamentosas)

Exercise caution when coadministering TOFIDENCE with CYP3A4 substrate drugs where decrease in effectiveness is undesirable, e.g., oral contraceptives, lovastatin, atorvastatin, etc. (etiqueta de Tocilizumab, Interacciones medicamentosas)

Patients taking estrogen-containing or progestin-only contraceptives should be asked to report any change in their bleeding patterns. (etiqueta de Topiramato, Interacciones medicamentosas)

Estrogens, including oral contraceptives: Estrogens may decrease the hepatic metabolism of certain corticosteroids, thereby increasing their effect. (etiqueta de Triamcinolona, Interacciones medicamentosas)

Advise women to follow the instructions on the initiation or resumption of hormonal contraceptives after ella intake [see Dosage and Administration(2.2) ]. (etiqueta de Ulipristal, Advertencias y precauciones)

…Skyla with caution after careful assessment if any of the following conditions exist, and consider removal of the system if any of them arise during use: • Coagulopathy or use of anticoagulants • Migraine, focal migraine with asymmetrical visual loss or other symptoms indicating transient cerebral ischemia • Exceptionally severe headache • Marked increase of… (etiqueta de Levonorgestrel, Advertencias y precauciones)

These drugs include the thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium channel-blocking drugs, and isoniazid. (etiqueta de Acarbosa, Interacciones medicamentosas)

Drug products which may be affected include oral or other systemic hormonal contraceptives. (etiqueta de Bexaroteno, Interacciones medicamentosas)

Effect of SYMPAZAN ® on Other Drugs Hormonal Contraceptives SYMPAZAN ® is a weak CYP3A4 inducer. (etiqueta de Clobazam, Interacciones medicamentosas)

Moderate or weak CYP1A2 inhibitors include oral contraceptives and caffeine. (etiqueta de Clozapina, Interacciones medicamentosas)

These medications include thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium channel blocking drugs, and isoniazid. (etiqueta de Dapagliflozina y metformina, Interacciones medicamentosas)

Concurrent use of tetracyclines with oral contraceptives may render oral contraceptives less effective. (etiqueta de Demeclociclina, Interacciones medicamentosas)

Oral Contraceptives The effect of oral contraceptives on the pharmacokinetics of Dihydroergotamine Mesylate Injection, USP has not been studied. (etiqueta de Dihidroergotamina, Interacciones medicamentosas)

Concurrent use of tetracyclines, including doxycycline hyclate may render oral contraceptives less effective. (etiqueta de Doxiciclina, Interacciones medicamentosas)

Hormonal contraceptives: Oral Ethinyl estradiol/ Norgsetimate Implant Etonogestrel ↑ active metabolites of norgestimate * ↓ etonogestrel A reliable method of barrier contraception should be used in addition to hormonal contraceptives. (etiqueta de Efavirenz, Interacciones medicamentosas)

Hormonal contraceptives: Oral Ethinyl estradiol/ Norgestimate ↓ active metabolites of norgestimate A reliable method of barrier contraception should be used in addition to hormonal contraceptives. (etiqueta de Efavirenz, lamivudina y tenofovir, Interacciones medicamentosas)

These drugs include the thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium channel blocking drugs, and isoniazid. (etiqueta de Empagliflozina y metformina, Interacciones medicamentosas)

Oral contraceptives: Ethinyl estradiol/norethindrone a Alternative methods of non-hormonal contraception are recommended. (etiqueta de Fosamprenavir, Interacciones medicamentosas)

These drugs include the thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium channel blocking drugs, and isoniazid. (etiqueta de Glibenclamida, Interacciones medicamentosas)

Examples: Thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium channel blockers, and isoniazid. (etiqueta de Glibenclamida y metformina, Interacciones medicamentosas)

These drugs include thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium channel blocking drugs, and isoniazid. (etiqueta de Glipizida y metformina, Precauciones)

…carbamazepine and oxcarbazepine Antibiotics: rifampicin and rifabutin Barbiturates: phenobarbital and primidone Antiretrovirals: efavirenz and nevirapine Estrogen and Estrogen Containing Products Clinical Impact: Oral estrogen and estrogen-containing oral contraceptives may interact with hydrocortisone by increasing serum cortisol-binding globulin (CBG) concentration. (etiqueta de Hidrocortisona, Interacciones medicamentosas)

Atypical Antipsychotics (e.g., olanzapine and clozapine), Corticosteroids, Danazol, Diuretics, Estrogens, Glucagon, Isoniazid, Niacin, Oral Contraceptives, Phenothiazines, Progestogens (e.g., in oral contraceptives), Protease inhibitors, Somatropin, Sympathomimetic Agents (e.g., albuterol, epinephrine, terbutaline) and Thyroid Hormones. (etiqueta de Insulina regular (humana), Interacciones medicamentosas)

Oral Contraceptives Isotretinoin Capsules did not result in clinically significant changes in the pharmacokinetics of norethindrone and ethinyl estradiol when used concomitantly with a norethindrone and ethinyl estradiol oral contraceptive [see Clinical Pharmacology ( 12.3 )]. (etiqueta de Isotretinoína, Interacciones medicamentosas)

Potential pharmacokinetic interactions of or with levetiracetam were assessed in clinical pharmacokinetic studies (phenytoin, valproate, warfarin, digoxin, oral contraceptive, probenecid) and through pharmacokinetic screening in the placebo-controlled clinical studies in epilepsy patients. (etiqueta de Levetiracetam, Interacciones medicamentosas)

These drugs include the thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium channel blocking drugs, and isoniazid. (etiqueta de Linagliptina y metformina, Interacciones medicamentosas)

Contraceptive: ethinyl estradiol* ↓ ethinyl estradiol Because contraceptive steroid concentrations may be altered when KALETRA is co-administered with oral contraceptives or with the contraceptive patch, alternative methods of nonhormonal contraception are recommended. (etiqueta de Lopinavir y ritonavir, Interacciones medicamentosas)

Examples: Thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium channel blockers, and isoniazid. (etiqueta de Metformina, Interacciones medicamentosas)

Drug interaction studies were conducted in adult patients to investigate the effect of coadministered drugs on the pharmacokinetics of mirabegron and the effect of mirabegron on the pharmacokinetics of coadministered drugs (e.g., ketoconazole, rifampin, solifenacin succinate, tamsulosin, and oral contraceptives) [see Clinical Pharmacology ( 12.3 )] . (etiqueta de Mirabegrón, Interacciones medicamentosas)

Moderate and weak CYP3A4 inhibitors include alprozalam, ameprenavir, amiodarone, aprepitant, atazanavir, cimetidine, cyclosporine, diltiazem, erythromycin, fluconazole, fluoxetine, isoniazid, oral contraceptives, quinuprestin/dalfopristin, valproic acid, and verapamil. (etiqueta de Nimodipino, Interacciones medicamentosas)

These drugs include the thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium channel blockers, and isoniazid. (etiqueta de Pioglitazona y metformina, Interacciones medicamentosas)

No pharmacokinetic interactions were observed between LYRICA and carbamazepine, gabapentin, lamotrigine, oral contraceptive, phenobarbital, phenytoin, topiramate, and valproic acid. (etiqueta de Pregabalina, Interacciones medicamentosas)

Examples: Atypical antipsychotics (e.g., olanzapine and clozapine), calcium channel antagonists, corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g., albuterol, epinephrine, terbutaline), and… (etiqueta de Repaglinida, Interacciones medicamentosas)

Hormonal contraceptives may be less effective with BANZEL; use additional non-hormonal forms of contraception ( 7.3 ) (etiqueta de Rufinamida, Interacciones medicamentosas)

These medications include the thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium channel blocking drugs, and isoniazid. (etiqueta de Saxagliptina y metformina, Interacciones medicamentosas)

Examples: Thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium channel blockers, and isoniazid. (etiqueta de Sitagliptina y metformina, Interacciones medicamentosas)

There is no information available from adequate drug-drug interaction studies with the following classes of drugs: oral contraceptives, hormone replacement therapies, hypoglycemics, phenytoins, thiazide diuretics, and calcium channel blockers. (etiqueta de Terbinafina, Interacciones medicamentosas)

Concurrent use of tetracycline may render oral contraceptives less effective. (etiqueta de Tetraciclina, Interacciones medicamentosas)

Oral Contraceptives Concurrent use of antibacterial drugs with oral contraceptives may render oral contraceptives less effective. (etiqueta de Tigeciclina, Interacciones medicamentosas)

Oral Contraceptives In vivo studies have revealed no effect of ziprasidone on the pharmacokinetics of estrogen or progesterone components. (etiqueta de Ziprasidona, Interacciones medicamentosas)

No significant interactions with digoxin, hydrochlorothiazide, hydralazine, sulfinpyrazone, oral contraceptives, tolbutamide, or warfarin have been observed. (etiqueta de Acebutolol, Interacciones medicamentosas)

Another study showed that alosetron had no clinically significant effect on plasma concentrations of the oral contraceptive agents ethinyl estradiol and levonorgestrel (CYP3A4 substrates). (etiqueta de Alosetrón, Interacciones medicamentosas)

Combination oral contraceptives Darifenacin (10 mg three times daily) had no effect on the pharmacokinetics of the combination oral contraceptives containing levonorgestrel and ethinyl estradiol [see Clinical Pharmacology (12.3)] . (etiqueta de Darifenacina, Interacciones medicamentosas)

In addition, studies in healthy volunteers have shown that dofetilide does not affect the pharmacokinetics or pharmacodynamics of warfarin, or the pharmacokinetics of propranolol (40 mg twice daily), phenytoin, theophylline, or oral contraceptives. (etiqueta de Dofetilida, Interacciones medicamentosas)

…clinically significant changes in concentration were observed for the following agents when co-administered with doravirine: dolutegravir, lamivudine, TDF, elbasvir and grazoprevir, ledipasvir and sofosbuvir, atorvastatin, an oral contraceptive containing ethinyl estradiol and levonorgestrel, metformin, methadone, and midazolam [see Clinical Pharmacology (12.3) ] . (etiqueta de Doravirina, Interacciones medicamentosas)

No clinically significant drug interactions have been observed between TDF and the following medications: entecavir, methadone, oral contraceptives, ribavirin, sofosbuvir, or tacrolimus in studies conducted in healthy subjects. (etiqueta de Emtricitabina, rilpivirina y tenofovir, Interacciones medicamentosas)

Oral Contraceptives In the presence of fesoterodine, there are no clinically significant changes in the plasma concentrations of combined oral contraceptives containing ethinyl estradiol and levonorgestrel [see Clinical Pharmacology (12.3) ] . (etiqueta de Fesoterodina, Interacciones medicamentosas)

…sofosbuvir is used with the following drugs [see Clinical Pharmacology (12.3) ]: abacavir, atazanavir/ritonavir, cyclosporine, darunavir/ritonavir, dolutegravir, efavirenz, elvitegravir/cobicistat/emtricitabine/tenofovir alafenamide, emtricitabine, lamivudine, methadone, midazolam, oral contraceptives, pravastatin, raltegravir, rilpivirine, tacrolimus, or verapamil. (etiqueta de Ledipasvir y sofosbuvir, Interacciones medicamentosas)

No dose adjustment is needed when SINGULAIR is co-administered with theophylline, prednisone, prednisolone, oral contraceptives, fexofenadine, digoxin, warfarin, gemfibrozil, itraconazole, thyroid hormones, sedative hypnotics, non-steroidal anti-inflammatory agents, benzodiazepines, decongestants, and Cytochrome P450 (CYP) enzyme inducers [see Clinical Pharmacology… (etiqueta de Montelukast, Interacciones medicamentosas)

Drugs without Clinically Significant Interactions with ISENTRESS In drug interaction studies, raltegravir did not have a clinically meaningful effect on the pharmacokinetics of the following: hormonal contraceptives, methadone, lamivudine, tenofovir, etravirine, darunavir/ritonavir, or boceprevir. (etiqueta de Raltegravir, Interacciones medicamentosas)

Oral contraceptives : In a study of concurrent administration of an oral contraceptive during 6 days of administration of MAXALT (10-30 mg/day) in healthy female volunteers (n=18), rizatriptan did not affect plasma concentrations of ethinyl estradiol or norethindrone. (etiqueta de Rizatriptán, Interacciones medicamentosas)

Oral Contraceptives : Multiple dose administration of tiagabine (8 mg/day monotherapy) did not alter the pharmacokinetics of oral contraceptives in healthy women of child-bearing age. (etiqueta de Tiagabina, Interacciones medicamentosas)

In a single-blind, parallel-group, 3-week study in 39 healthy female subjects taking oral contraceptives, 40 mg twice daily of zafirlukast had no significant effect on ethinyl estradiol plasma concentrations or contraceptive efficacy. (etiqueta de Zafirlukast, Precauciones)

Other Concomitant Drug Therapy Drug-drug interaction studies conducted in healthy subjects between zileuton immediate-release tablets and prednisone and ethinyl estradiol (oral contraceptive), drugs known to be metabolized by the CYP3A4 isoenzyme, have shown no significant interaction. (etiqueta de Zileutón, Interacciones medicamentosas)