Fondaparinux interactions

Warfarin Potentiates anticoagulant response and can result in serious or fatal bleeding. (Amiodarone label, Drug interactions)

…use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity or spinal surgery • Optimal timing between the administration of fondaparinux… (Fondaparinux label, Boxed warning)

…risk of developing epidural or spinal hematomas in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity… (Fondaparinux label, Boxed warning)

…risk of developing epidural or spinal hematomas in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity… (Fondaparinux label, Boxed warning)

…risk of developing epidural or spinal hematomas in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity… (Fondaparinux label, Boxed warning)

…in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity or spinal surgery • Optimal timing between… (Fondaparinux label, Boxed warning)

…in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity or spinal surgery • Optimal timing between… (Fondaparinux label, Boxed warning)

…use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity or spinal surgery • Optimal timing between the administration of fondaparinux… (Fondaparinux label, Boxed warning)

…risk of developing epidural or spinal hematomas in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity… (Fondaparinux label, Boxed warning)

…in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity or spinal surgery • Optimal timing between… (Fondaparinux label, Boxed warning)

…use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity or spinal surgery • Optimal timing between the administration of fondaparinux… (Fondaparinux label, Boxed warning)

WARNING: SPINAL/EPIDURAL HEMATOMAS Epidural or spinal hematomas may occur in patients who are anticoagulated with low molecular weight heparins (LMWH), heparinoids, or fondaparinux sodium and are receiving neuraxial anesthesia or undergoing spinal puncture. (Fondaparinux label, Boxed warning)

…risk of developing epidural or spinal hematomas in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity… (Fondaparinux label, Boxed warning)

WARNING: SPINAL/EPIDURAL HEMATOMAS Epidural or spinal hematomas may occur in patients who are anticoagulated with low molecular weight heparins (LMWH), heparinoids, or fondaparinux sodium and are receiving neuraxial anesthesia or undergoing spinal puncture. (Fondaparinux label, Boxed warning)

…risk of developing epidural or spinal hematomas in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity… (Fondaparinux label, Boxed warning)

…risk of developing epidural or spinal hematomas in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity… (Fondaparinux label, Boxed warning)

Anticoagulants and Antiplatelets Ticagrelor Contraindicated during and 2 weeks after TOLSURA treatment. (Itraconazole label, Drug interactions)

…risk of developing epidural or spinal hematomas in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity… (Fondaparinux label, Boxed warning)

…risk of developing epidural or spinal hematomas in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity… (Fondaparinux label, Boxed warning)

…risk of developing epidural or spinal hematomas in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity… (Fondaparinux label, Boxed warning)

…risk of developing epidural or spinal hematomas in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity… (Fondaparinux label, Boxed warning)

…in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity or spinal surgery • Optimal timing between… (Fondaparinux label, Boxed warning)

…Antipsychotics Haloperidol Decrease plasma concentrations by 70% Lurasidone Prevention or Management : Concomitant use is contraindicated (See CONTRAINDICATIONS ) Decrease exposure Oral Anticoagulants Prevention or Management: Perform prothrombin time daily or as frequently as necessary to establish and maintain the required dose of anticoagulant Warfarin Decrease… (Rifampin label, Drug interactions)

Anticoagulant: rivaroxaban ↑ rivaroxaban Avoid concomitant use of rivaroxaban and ritonavir. (Ritonavir label, Drug interactions)

…use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity or spinal surgery • Optimal timing between the administration of fondaparinux… (Fondaparinux label, Boxed warning)

…risk of developing epidural or spinal hematomas in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity… (Fondaparinux label, Boxed warning)

For women with DCIS and for the reduction in breast cancer incidence in women at high risk, tamoxifen is contraindicated in women who require concomitant warfarin-type anticoagulant therapy or in women with a history of deep vein thrombosis or pulmonary embolus. (Tamoxifen label, Warnings and precautions)

…in these patients include: • use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity or spinal surgery • Optimal timing between… (Fondaparinux label, Boxed warning)

Do not administer agents that enhance the risk of hemorrhage with fondaparinux sodium unless essential for the management of the underlying condition, such as vitamin K antagonists for the treatment of VTE. (Fondaparinux label, Warnings and precautions)

…use of indwelling epidural catheters • concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, or other anticoagulants • a history of traumatic or repeated epidural or spinal puncture • a history of spinal deformity or spinal surgery • Optimal timing between the administration of fondaparinux… (Fondaparinux label, Boxed warning)

Chronic oral acetaminophen use at a dose of 4,000 mg/day has been shown to cause an increase in international normalized ratio (INR) in some patients who have been stabilized on sodium warfarin as an anticoagulant. (Acetaminophen label, Drug interactions)

Dicumarol Clinical Impact Allopurinol tablets prolongs the half-life of the anticoagulant, dicumarol. (Allopurinol label, Drug interactions)

Concomitant use of amoxicillin and oral anticoagulants may increase the prolongation of prothrombin time. (Amoxicillin label, Drug interactions)

Concomitant use Amoxicillin and Clavulanate Potassium Extended Release Tablets and oral anticoagulants may increase the prolongation of prothrombin time. (Amoxicillin and clavulanate label, Drug interactions)

• Proguanil may potentiate anticoagulant effect of warfarin and other coumarin-based anticoagulants. (Atovaquone and proguanil label, Drug interactions)

Prothrombin times should be carefully monitored while patients are receiving azithromycin and oral anticoagulants concomitantly. (Azithromycin label, Drug interactions)

Closely monitor for adverse reactions of CYP2C9 substrates where minimal concentration changes may lead to serious adverse reactions when used concomitantly with XELODA (e.g., anticoagulants, antidiabetic drugs). (Capecitabine label, Drug interactions)

Warfarin (CYP1A2 and CYP3A4 Substrate) Through induction of CYP1A2 and CYP3A4, EQUETRO decreases the concentration of warfarin and decreases its anticoagulant effectiveness. (Carbamazepine label, Drug interactions)

Those at risk include patients with renal or hepatic impairment, or poor nutritional state, as well as patients receiving a protracted course of antimicrobial therapy, and patients previously stabilized on anticoagulant therapy. (Cefixime label, Warnings and precautions)

Those at risk include patients with renal or hepatic impairment, or poor nutritional state, as well as patients receiving a protracted course of antibacterial therapy, and patients receiving anticoagulant therapy. (Cephalexin label, Warnings and precautions)

Drug Interactions Cimetidine tablets, apparently through an effect on certain microsomal enzyme systems, has been reported to reduce the hepatic metabolism of warfarin-type anticoagulants, phenytoin, propranolol, nifedipine, chlordiazepoxide, diazepam, certain tricyclic antidepressants, lidocaine, theophylline, and metronidazole, thereby delaying elimination… (Cimetidine label, Drug interactions)

Anti-coagulant drugs Use with caution (Increase in anticoagulant effect) The risk may vary with the underlying infection, age and general status of the patient so that the contribution of ciprofloxacin to the increase in INR (international normalized ratio) is difficult to assess. (Ciprofloxacin label, Drug interactions)

Increased Risk of Bleeding: Concomitant use of aspirin, nonsteroidal anti-inflammatory drugs, other antiplatelet drugs, warfarin, and other anticoagulants may increase this risk. (Citalopram label, Warnings and precautions)

Oral Anticoagulants: There is a risk of serious hemorrhage and significant elevations in INR and prothrombin time when clarithromycin is co-administered with warfarin. (Clarithromycin label, Warnings and precautions)

The risk of GI hemorrhage may be increased when administering Exjade in combination with drugs that have ulcerogenic or hemorrhagic potential, such as nonsteroidal anti-inflammatory drugs (NSAIDs), corticosteroids, oral bisphosphonates, or anticoagulants. (Deferasirox label, Warnings and precautions)

• Increased Risk of Bleeding: Concomitant use of aspirin, NSAIDs, other antiplatelet drugs, warfarin, and other anticoagulants may increase this risk ( 5.4 ). (Desvenlafaxine label, Warnings and precautions)

(‎ 5.3 ) • Venous and Arterial Thromboembolism: Risk increased; consider anticoagulant prophylaxis and monitor for evidence of thromboembolism. (Dexamethasone label, Warnings and precautions)

Dicloxacillin may reduce the anticoagulant response to dicumarol and warfarin. (Dicloxacillin label, Drug interactions)

It may be necessary to adjust the dosage of oral anticoagulants upon beginning or stopping disulfiram, since disulfiram may prolong prothrombin time. (Disulfiram label, Drug interactions)

The therapeutic relevance of this is unknown; however, coagulation tests should be monitored if valproate therapy is instituted in patients taking anticoagulants. (Divalproex (valproate) label, Drug interactions)

Concomitant medications were grouped as ACE inhibitors, oral anticoagulants, calcium channel blockers, beta blockers, cardiac glycosides, inducers of CYP3A4, substrates and inhibitors of CYP3A4, substrates and inhibitors of P-glycoprotein, nitrates, sulphonylureas, loop diuretics, potassium sparing diuretics, thiazide diuretics, substrates and inhibitors of tubular… (Dofetilide label, Drug interactions)

Patients who are on anticoagulant therapy may require downward adjustment of their anticoagulant dosage. (Doxycycline label, Drug interactions)

Concomitant use of antiplatelet drugs and anticoagulants may increase this risk ( 5.5 , 7.4 , 8.1 ) (Duloxetine label, Warnings and precautions)

- 7.1 Warfarin Concomitant administration of econazole and warfarin has resulted in enhancement of anticoagulant effect. (Econazole label, Drug interactions)

There have been reports of increased anticoagulant effects when erythromycin and oral anticoagulants were used concomitantly. (Erythromycin label, Drug interactions)

Increased Risk of Bleeding: Concomitant use of nonsteroidal anti-inflammatory drugs, aspirin, other antiplatelet drugs, warfarin and other anticoagulants may increase risk ( 5.7 , 7) (Escitalopram label, Warnings and precautions)

A number of drugs, including ethacrynic acid, have been shown to displace warfarin from plasma protein; a reduction in the usual anticoagulant dosage may be required in patients receiving both drugs. (Ethacrynic acid label, Drug interactions)

Coumarin Anticoagulants: Obtain INR before VYTORIN initiation and monitor INR during VYTORIN dosage initiation or adjustment. (Ezetimibe and simvastatin label, Drug interactions)

Increased Bleeding Risk with Coumarin Anticoagulants Exercise caution when co-administering anticoagulants with fenofibrate capsules because of the potentiation of coumarin-type anticoagulant effects in prolonging the prothrombin time/International Normalized Ratio (PT/INR). (Fenofibrate label, Warnings and precautions)

Coumarin-type anticoagulants Prothrombin time may be increased in patients receiving concomitant fluconazole and coumarin-type anticoagulants. (Fluconazole label, Drug interactions)

Oral anticoagulants — decreased prothrombin time response. (Fludrocortisone label, Drug interactions)

Altered anticoagulant effects, including increased bleeding, have been reported when SNRIs or SSRIs are coadministered with warfarin. (Fluoxetine label, Drug interactions)

Thus patients receiving oral anticoagulants and Fluvoxamine Maleate Tablets should have their prothrombin time monitored and their anticoagulant dose adjusted accordingly. (Fluvoxamine label, Warnings and precautions)

Concomitant Anticoagulants – Caution should be exercised when warfarin is given in conjunction with LOPID. (Gemfibrozil label, Warnings)

Ginkgo may increase bleeding risk when taken with anticoagulant or antiplatelet medicines. (NCCIH, Ginkgo)

Warfarin Clincial Impact: GVOKE and GVOKE Vial Dx may increase the anticoagulant effect of warfarin. (Glucagon label, Drug interactions)

Griseofulvin decreases the activity of warfarin-type anticoagulants, so that patients receiving these drugs concomitantly may require dosage adjustment of the anticoagulant during and after griseofulvin therapy. (Griseofulvin label, Drug interactions)

Intervention: Monitor coagulation indices in patients receiving ALKINDI SPRINKLE and concomitant warfarin to maintain the desired anticoagulant effect. (Hydrocortisone label, Drug interactions)

Increased Bleeding Risk with Anticoagulants and Antiplatelet Agents: Some published studies with omega-3 fatty acids have demonstrated prolongation of bleeding time. (Icosapent ethyl label, Drug interactions)

Anticoagulants and Antiplatelet Drugs rivaroxaban cilostazol, coumarins, dabigatran Cilostazol: Concomitant administration of single doses of cilostazol 100 mg and ketoconazole 400 mg approximately doubled cilostazol concentrations and altered (increase/decrease) the concentrations of the active metabolites of cilostazol. (Ketoconazole label, Drug interactions)

Increased Risk of Bleeding : Concomitant use of NSAIDs, aspirin, other antiplatelet drugs, warfarin, and other anticoagulants may increase this risk ( 5.5 ). (Levomilnacipran label, Warnings and precautions)

…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… (Levonorgestrel label, Warnings and precautions)

Oral Anticoagulants Levothyroxine increases the response to oral anticoagulant therapy. (Levothyroxine label, Drug interactions)

Oral Anticoagulants Liothyronine sodium increases the response to oral anticoagulant therapy. (Liothyronine label, Drug interactions)

Also, bleeding and/or increased prothrombin time have been reported in a few patients taking coumarin anticoagulants concomitantly with lovastatin. (Lovastatin label, Drug interactions)

Drug Interactions Anticoagulants (oral): Due to potential inhibition of vitamin K activity by methimazole, the activity of oral anticoagulants (e.g., warfarin) may be increased; additional monitoring of PT/INR should be considered, especially before surgical procedures. β-adrenergic blocking agents: Hyperthyroidism may cause an increased clearance of beta blockers… (Methimazole label, Drug interactions)

Therefore, coagulation indices should be monitored frequently to maintain the desired anticoagulant effect. (Methylprednisolone label, Drug interactions)

Anticoagulants Metolazone, as well as other thiazide-like diuretics, may affect the hypoprothrombinemic response to anticoagulants; dosage adjustments may be necessary. (Metolazone label, Drug interactions)

Warfarin and Other Oral Anticoagulants : LIKMEZ can potentiate the anticoagulant effect. (Metronidazole label, Drug interactions)

Warfarin: Miconazole may enhance anticoagulant effect. (Miconazole label, Drug interactions)

Patients who are on anticoagulant therapy may require downward adjustment of their anticoagulant dosage. (Minocycline label, Drug interactions)

Interacting Drug Interaction Warfarin Anticoagulant effect of warfarin may be enhanced. (Moxifloxacin label, Drug interactions)

Oral neomycin sulfate may enhance the effect of coumarin in anticoagulants by decreasing vitamin K availability. (Neomycin label, Drug interactions)

Caution should be observed when niacin extended-release tablets are administered concomitantly with anticoagulants; platelet counts should be monitored closely in such patients. (Niacin label, Warnings and precautions)

Coumarin Anticoagulants There have been rare reports of increased prothrombin time in patients taking coumarin anticoagulants to whom nifedipine was administered. (Nifedipine label, Drug interactions)

Anticoagulants Nintedanib is a VEGFR inhibitor and may increase the risk of bleeding. (Nintedanib label, Drug interactions)

Anticoagulants warfarin ↑↓ warfarin Closely monitor international normalized ratio (INR) if co-administration with warfarin is necessary. rivaroxaban ↑ rivaroxaban Increased bleeding risk with rivaroxaban. (Nirmatrelvir and ritonavir label, Drug interactions)

Warfarin Some quinolones have been reported to enhance the effects of the oral anticoagulant warfarin or its derivatives. (Ofloxacin label, Drug interactions)

Patients taking omega-3-acid ethyl esters capsules and an anticoagulant or other drug affecting coagulation (e.g., anti-platelet agents) should be monitored periodically. (Omega-3-acid ethyl esters label, Drug interactions)

Anticoagulants including Warfarin Vitamin K absorption may be decreased with ORLISTAT. (Orlistat label, Drug interactions)

Concomitant use of aspirin, nonsteroidal anti-inflammatory drugs (NSAIDs), other antiplatelet drugs, warfarin, and other anticoagulants may add to this risk [see Drug Interactions ( 7.3 )] . (Paroxetine label, Warnings and precautions)

DRUG INTERACTIONS Bleeding has been reported in patients treated with pentoxifylline extended-release tablets with or without concomitant NSAIDs, anticoagulants, or platelet aggregation inhibitors. (Pentoxifylline label, Drug interactions)

…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 is unpredictable. (Phenytoin label, Drug interactions)

Do not administer agents that enhance the risk of hemorrhage with fondaparinux sodium unless essential for the management of the underlying condition, such as vitamin K antagonists for the treatment of VTE. (Fondaparinux label, Warnings and precautions)

Therefore, coagulation indices should be monitored frequently to maintain the desired anticoagulant effect. (Prednisolone label, Drug interactions)

Anticoagulant agents: May enhance or diminish anticoagulant effects. (Prednisone label, Drug interactions)

Drug Interactions Anticoagulants (oral): Due to the potential inhibition of vitamin K activity by propylthiouracil, the activity of oral anticoagulants (e.g., warfarin) may be increased; additional monitoring of PT/INR should be considered, especially before surgical procedures. (Propylthiouracil label, Drug interactions)

The anticoagulant effect of a single dose of warfarin (measured by prothrombin time) was not significantly changed by quinapril coadministration twice-daily. (Quinapril label, Drug interactions)

Increased Risk of Bleeding: Concomitant use of aspirin, nonsteroidal anti-inflammatory drugs (NSAIDs), other antiplatelet drugs, warfarin, and other anticoagulants may increase this risk ( 5.3 ) (Sertraline label, Warnings and precautions)

Coumarin Anticoagulants: Obtain INR before ZOCOR initiation and monitor INR during ZOCOR dosage initiation or adjustment. (Simvastatin label, Drug interactions)

Anticoagulants: dabigatran etexilate ↑ dabigatran Clinical monitoring of dabigatran is recommended when coadministered with VOSEVI. (Sofosbuvir and velpatasvir label, Drug interactions)

It has been reported that sulfamethoxazole and trimethoprim may prolong the prothrombin time in patients who are receiving the anticoagulant warfarin. (Sulfamethoxazole and trimethoprim label, Drug interactions)

Oral Vitamin K Antagonist Anticoagulants Changes in anticoagulant activity may be seen with androgens; therefore, more frequent monitoring of international normalized ratio (INR) and prothrombin time are recommended in patients taking warfarin, especially at the initiation and termination of androgen therapy. (Testosterone label, Drug interactions)

Because the tetracyclines have been shown to depress plasma prothrombin activity, patients who are on anticoagulant therapy may require downward adjustment of their anticoagulant dosage. (Tetracycline label, Drug interactions)

The following drug interactions were reported for metronidazole, a chemically-related nitroimidazole and may therefore occur with tinidazole: Warfarin and other oral coumarin anticoagulants: Anticoagulant dosage may need adjustment during and up to 8 days after tinidazole therapy ( 7.1 ) (Tinidazole label, Drug interactions)

Increased Risk of Bleeding: Concomitant use of aspirin, nonsteroidal anti-inflammatory drugs (NSAIDs), other antiplatelet drugs, warfarin, and other anticoagulants may increase this risk ( 5.5 ). (Trazodone label, Warnings and precautions)

Therefore, coagulation indices should be monitored frequently to maintain the desired anticoagulant effect. (Triamcinolone label, Drug interactions)

The effect of oral anticoagulants may be decreased when used concurrently with hydrochlorothiazide; dosage adjustments may be necessary. (Triamterene and hydrochlorothiazide label, Drug interactions)

The therapeutic relevance of this is unknown; however, coagulation tests should be monitored if valproate therapy is instituted in patients taking anticoagulants. (Valproic acid label, Drug interactions)

Concomitant use of aspirin, Nonsteroidal Anti-Inflammatory Drugs (NSAIDs), warfarin, and other anticoagulants may add to this risk. (Venlafaxine label, Warnings and precautions)

Increased Risk of Bleeding: Concomitant use of aspirin, nonsteroidal anti-inflammatory drugs (NSAIDs), other antiplatelet drugs, warfarin, and other anticoagulants may increase this risk ( 5.3 ) (Vilazodone label, Warnings and precautions)

Vitamin E can inhibit platelet aggregation and vitamin K-dependent clotting, increasing bleeding risk with anticoagulant and antiplatelet drugs. (NIH Office of Dietary Supplements, Vitamin E)

Warfarin (CYP2C9 Inhibition) Other Oral Coumarin Anticoagulants (CYP2C9/3A4 Inhibition) Prothrombin Time Significantly Increased Not Studied In Vivo or In Vitro for other Oral Coumarin Anticoagulants, but Drug Plasma Exposure Likely to be Increased If patients receiving coumarin preparations are treated simultaneously with voriconazole, the prothrombin time or… (Voriconazole label, Drug interactions)

Concomitant use of aspirin, nonsteroidal anti-inflammatory drugs (NSAIDs), warfarin, and other anticoagulants may add to this risk. (Vortioxetine label, Warnings and precautions)

Patients on oral warfarin anticoagulant therapy and zafirlukast should have their prothrombin times monitored closely and anticoagulant dose adjusted accordingly (see PRECAUTIONS, Drug Interactions ). (Zafirlukast label, Warnings)

Use with Warfarin: IMURAN may inhibit the anticoagulant effect of warfarin. (Azathioprine label, Drug interactions)

Anticoagulants: Direct Oral Anticoagulants (DOACs) rivaroxaban dabigatran edoxaban ↑ DOAC Refer to the DOAC prescribing information for concomitant administration with moderate CYP3A inhibitors and/or P-gp inhibitors. (Bictegravir, emtricitabine, and tenofovir alafenamide label, Drug interactions)

Chlorpromazine diminishes the effect of oral anticoagulants. (Chlorpromazine label, Precautions)

In addition, fondaparinux sodium neither influenced the pharmacodynamics of warfarin sodium, acetylsalicylic acid, piroxicam, and digoxin, nor the pharmacokinetics of digoxin at steady state. (Fondaparinux label, Drug interactions)

More patients experienced clinically significant INR elevations (≥5) usually within 1 week after starting dronedarone versus placebo in patients taking oral anticoagulants in ATHENA. (Dronedarone label, Drug interactions)

Omega-3 supplements may mildly prolong bleeding time; the combination with anticoagulants such as warfarin warrants monitoring, though clinically significant bleeding has not been consistently shown. (NIH Office of Dietary Supplements, Omega-3 Fatty Acids)

Consequently, interactions with other drugs which are highly protein bound (e.g., anticoagulants ) would not be expected. (Flecainide label, Drug interactions)

In a pharmacokinetic interaction study with warfarin, bioavailability parameters, the degree of protein binding, and the anticoagulant effect (measured by prothrombin time) of warfarin were not significantly changed. (Fosinopril label, Drug interactions)

Garlic supplements may increase bleeding risk with anticoagulants such as warfarin. (NCCIH, Garlic)

Oral Anticoagulants: Interaction studies with warfarin failed to identify any clinically important effect on the serum concentrations of the anticoagulant or on its anticoagulant effect. (Moexipril label, Drug interactions)

Phenothiazines can diminish the effect of oral anticoagulants. (Prochlorperazine label, Precautions)

The anticoagulant effect of warfarin was not significantly changed by trandolapril. (Trandolapril label, Drug interactions)

Warfarin In a study conducted in 16 male volunteers, anastrozole did not alter the exposure (as measured by C max and AUC) and anticoagulant activity (as measured by prothrombin time, activated partial thromboplastin time, and thrombin time) of both R- and S-warfarin. (Anastrozole label, Drug interactions)

Anticoagulants Interaction studies in humans have shown bumetanide to have no effect on warfarin metabolism or on plasma prothrombin activity. (Bumetanide label, Drug interactions)

Warfarin A clinical study has shown that fesoterodine 8 mg once daily has no significant effect on the pharmacokinetics or the anticoagulant activity (PT/INR) of warfarin 25 mg. (Fesoterodine label, Drug interactions)