Abiraterone interactions

Interactions with Drugs Affecting Cytochrome P450 Isoenzymes The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with codeine are complex. (Acetaminophen and codeine label, Boxed warning)

If concomitant use of DYANAVEL XR with other serotonergic drugs or CYP2D6 inhibitors is clinically warranted, initiate DYANAVEL XR with lower doses, monitor patients for the emergence of serotonin syndrome during drug initiation or titration, and inform patients of the increased risk for serotonin syndrome. (Amphetamine label, Warnings and precautions)

If serotonin syndrome occurs, discontinue ADDERALL XR and the CYP2D6 inhibitor [see Warnings and Precautions ( 5.8 ), Overdosage ( 10 )] . (Amphetamine and dextroamphetamine label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

Interactions with Drugs Affecting Cytochrome P450 Isoenzymes The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with codeine are complex. (Butalbital, acetaminophen, caffeine, and codeine label, Boxed warning)

The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with codeine are complex. (Butalbital, aspirin, caffeine, and codeine label, Boxed warning)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

Interactions with Drugs Affecting Cytochrome P450 Isoenzymes The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with codeine are complex. (Codeine label, Boxed warning)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

If serotonin syndrome occurs, discontinue dextroamphetamine sulfate and the CYP2D6 inhibitor [see Warnings , Overdosage ]. (Dextroamphetamine label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

Avoid the use of Hydrocodone Polistirex and Chlorpheniramine Polistirex while taking a CYP3A4 or CYP2D6 inhibitor. (Hydrocodone and chlorpheniramine label, Drug interactions)

Avoid the use of hydrocodone bitartrate and homatropine methylbromide while taking a CYP3A4 or CYP2D6 inhibitor. (Hydrocodone and homatropine label, Drug interactions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

Co-administration with eliglustat is contraindicated in poor or intermediate metabolizers of CYP2D6 and in subjects taking strong or moderate CYP2D6 inhibitors. (Itraconazole label, Boxed warning)

If concomitant use of VYVANSE with other serotonergic drugs or CYP2D6 inhibitors is clinically warranted, initiate VYVANSE with lower doses, monitor patients for the emergence of serotonin syndrome during drug initiation or titration, and inform patients of the increased risk for serotonin syndrome. (Lisdexamfetamine label, Warnings and precautions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

Interactions with Drugs Affecting Cytochrome P450 Isoenzymes The concomitant use of METHADOSE with all cytochrome P450 3A4, 2B6, 2C19, 2C9 or 2D6 inhibitors may result in an increase in methadone plasma concentrations, which could cause potentially fatal respiratory depression. (Methadone label, Boxed warning)

If serotonin syndrome occurs, discontinue methamphetamine hydrochloride tablets, USP and the CYP2D6 inhibitor [see Warnings and Precautions 5.8]. (Methamphetamine label, Drug interactions)

Increased fractures and mortality in combination with radium Ra 223 dichloride: Use of YONSA plus methylprednisolone in combination with radium Ra 223 dichloride is not recommended. (Abiraterone label, Warnings and precautions)

CYP2D6 Inhibitors Monitor patients closely when the combination use of CYP2D6 inhibitor and metoprolol cannot be avoided. (Metoprolol label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

Concomitant use of pimozide with paroxetine and other strong CYP 2D6 inhibitors is contraindicated (See PRECAUTIONS – DRUG INTERACTIONS ). (Pimozide label, Contraindications)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

Interactions with Drugs Affecting Cytochrome P450 Isoenzymes The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with codeine are complex, requiring careful consideration of the effects on the parent drug, codeine, and the active metabolite, morphine. (Promethazine and codeine label, Boxed warning)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

CYP3A4 Inducers: Avoid concomitant strong CYP3A4 inducers during YONSA treatment. (Abiraterone label, Drug interactions)

The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with tramadol are complex. (Tramadol label, Boxed warning)

Interactions with Drugs Affecting Cytochrome P450 Isoenzymes The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with tramadol are complex. (Tramadol and acetaminophen label, Boxed warning)

At the primary analysis, increased incidences of fractures (28.6% vs 11.4%) and deaths (38.5% vs 35.5%) have been observed in patients who received abiraterone acetate plus a corticosteroid in combination with radium Ra 223 dichloride compared to patients who received placebo in combination with abiraterone acetate plus a corticosteroid. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

CYP2D6 inhibitors and CYP3A4 Inhibitors : See full prescribing information for ABILIFY MAINTENA dosage modifications when used concomitantly with CYP2D6 inhibitors and/or CYP3A4 inhibitors for greater than 14 days ( 7.1 ) (Aripiprazole label, Drug interactions)

Strong CYP2D6 Inhibitors Prevention or Management With concomitant use of atomoxetine oral solution and a strong CYP2D6 inhibitor 1 , increase the titration interval [see Dosage and Administration (2.5) and Clinical Pharmacology (12.3) ] . (Atomoxetine label, Drug interactions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Strong CYP2D6 REXULTI may be administered without dosage adjustment in patients with MDD when administered with strong CYP2D6 inhibitors (e.g., paroxetine, fluoxetine). or CYP3A4 inhibitors Administer half of recommended dosage. (Brexpiprazole label, Drug interactions)

CYP2D6 inhibitors may potentiate systemic beta-blockade. (Brimonidine and timolol label, Drug interactions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

CYP2D6 Inhibitors and Poor Metabolizers Interactions of carvedilol with potent inhibitors of CYP2D6 isoenzyme (such as quinidine, fluoxetine, paroxetine, and propafenone) have not been studied, but these drugs would be expected to increase blood levels of the R(+) enantiomer of carvedilol [see Clinical Pharmacology (12.3) ]. (Carvedilol label, Drug interactions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Concomitant use of strong CYP2D6 inhibitors: Maximum recommended dose of AUSTEDO XR or AUSTEDO is 36 mg per day ( 2.3 , 7.1 ) (Deutetrabenazine label, Drug interactions)

CYP2D6 inhibitors may potentiate systemic beta-blockade. (Dorzolamide and timolol label, Drug interactions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Use caution in combination with moderate CYP3A4 inhibitors (e.g., erythromycin) or strong (e.g., paroxetine) or moderate CYP2D6 inhibitors, a combination of both CYP3A4 and CYP2D6 inhibitors, or known poor metabolizers of CYP2D6. (Dutasteride and tamsulosin label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

In poor metabolizers for CYP2D6, representing a maximum CYP2D6 inhibition, C max and AUC of the active metabolite are increased 1.7- and 2-fold, respectively. (Fesoterodine label, Drug interactions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

The haloperidol plasma concentrations increased when a CYP3A4 and/or CYP2D6 inhibitor was coadministered with haloperidol. (Haloperidol label, Drug interactions)

These effects could be more pronounced with concomitant use of hydrocodone bitartrate and acetaminophen tablets and both CYP3A4 and CYP2D6 inhibitors, particularly when an inhibitor is added after a stable dose of hydrocodone bitartrate and acetaminophen tablets is achieved [see WARNINGS ]. (Hydrocodone and acetaminophen label, Drug interactions)

Table 7: Clinically Important Drug Interactions with FANAPT Strong CYP2D6 Inhibitors Clinical Impact Coadministration of fluoxetine with iloperidone increased exposure (area under curve, [AUC]) of iloperidone and its metabolite P88, by about 2- to 3- fold, and decreased the AUC of its metabolite P95 by one-half [see Clinical Pharmacology (12.3 , 12.5) ] . (Iloperidone label, Drug interactions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

CYP2D6 Inhibitors : Concomitant use of paroxetine resulted in increased plasma levels of Lofexidine tablets. (Lofexidine label, Drug interactions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

• Strong CYP2D6 inhibitors (e.g., quinidine, bupropion, fluoxetine, and paroxetine) : See Full Prescribing Information for recommended dosage reductions. (Metoclopramide label, Drug interactions)

CYP2D6 inhibitors: Increased metoprolol concentration. (Metoprolol and hydrochlorothiazide label, Drug interactions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Use with CYP2D6 Inhibitors Nebivolol exposure increases with inhibition of CYP2D6 [see Drug Interactions ( 7 ) ] . (Nebivolol label, Warnings and precautions)

…nefazodone and its major metabolites are not altered in these “poor metabolizers.” Plasma concentrations of one minor metabolite (mCPP) are increased in this population; the adjustment of nefazodone dosage is not required when administered to “poor metabolizers.” Nefazodone and its metabolites have been shown in vitro to be extremely weak inhibitors of CYP2D6. (Nefazodone label, Drug interactions)

Inhibitors of CYP2D6 Fluoxetine: Fluoxetine (60 mg single dose or 60 mg daily dose for 8 days) causes a small (mean 16%) increase in the maximum concentration of olanzapine and a small (mean 16%) decrease in olanzapine clearance. (Olanzapine label, Drug interactions)

The Effect of Other Drugs on Olanzapine — Fluoxetine, an inhibitor of CYP2D6, decreases olanzapine clearance a small amount [see Clinical Pharmacology ( 12.3 )]. (Olanzapine and fluoxetine label, Drug interactions)

…prolonged opioid adverse reactions and exacerbated respiratory depression, may occur when OLINVYK is used under the following conditions: In patients with decreased Cytochrome P450 (CYP) 2D6 function (poor metabolizers of CYP2D6 or normal metabolizers taking moderate or strong CYP2D6 inhibitors) [See Drug Interactions ( 7 ); Use in Specific Populations ( 8.8 )]. (Oliceridine label, Warnings and precautions)

Hypoglycemia: Severe hypoglycemia has been reported in patients with pre-existing diabetes who are taking medications containing thiazolidinediones (including pioglitazone) or repaglinide. (Abiraterone label, Warnings and precautions)

Hypoglycemia: Severe hypoglycemia has been reported in patients with pre-existing diabetes who are taking medications containing thiazolidinediones (including pioglitazone) or repaglinide. (Abiraterone label, Warnings and precautions)

Hypoglycemia: Severe hypoglycemia has been reported in patients with pre-existing diabetes who are taking medications containing thiazolidinediones (including pioglitazone) or repaglinide. (Abiraterone label, Warnings and precautions)

Strong CYP2D6 Inhibitors: Increased exposure of WAKIX; reduce the maximum recommended dose of WAKIX by half ( 2.6 , 7.1 ) (Pitolisant label, Drug interactions)

Effects of Other Drugs on the Pharmacokinetics of Primaquine Strong CYP2D6 Inhibitors Published clinical and non-clinical reports indicate reduced CYP2D6 activity may decrease the formation of active metabolites of primaquine, which may reduce antimalarial efficacy of Primaquine phosphate Tablets (see CLINICAL PHARMACOLOGY, Pharmacogenomics ). (Primaquine label, Drug interactions)

Impact of Other Drugs on Propranolol CYP2D6, CYP1A2 and CYP2C19 Inhibitors: CYP2D6 inhibitors (e.g. bupropion, fluoxetine, paroxetine, quinidine), CYP1A2 inhibitors (e.g., ciprofloxacin, enoxamine, fluvoxamine) and CYP2C19 inhibitors (e.g., fluconazole, fluvoxamine, ticlopidine) increase exposure to propranolol when co-administered with INNOPRAN XL. (Propranolol label, Drug interactions)

Hypoglycemia: Severe hypoglycemia has been reported in patients with pre-existing diabetes who are taking medications containing thiazolidinediones (including pioglitazone) or repaglinide. (Abiraterone label, Warnings and precautions)

Fluoxetine and Paroxetine Fluoxetine (20 mg once daily) and paroxetine (20 mg once daily), CYP 2D6 inhibitors, have been shown to increase the plasma concentration of risperidone 2.5–2.8 fold and 3–9 fold respectively. (Risperidone label, Drug interactions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

Abiraterone: Spironolactone binds to the androgen receptor and may increase prostate‑specific antigen (PSA) levels in abiraterone-treated prostate cancer patients. (Spironolactone and hydrochlorothiazide label, Drug interactions)

Use with caution in combination with moderate inhibitors of CYP3A4, with strong or moderate inhibitors of CYP2D6, in patients known to be CYP2D6 poor metabolizers, or in combination with other cytochrome P450 inhibitors. (Tamsulosin label, Warnings and precautions)

• Do not exceed 50 mg/day and the maximum single dose should not exceed 25 mg if administered in conjunction with a strong CYP2D6 inhibitor (e.g., fluoxetine, paroxetine). (Tetrabenazine label, Warnings and precautions)

CYP2D6 Inhibitors Potentiated systemic beta-blockade (e.g., decreased heart rate) has been reported during combined treatment with CYP2D6 inhibitors (e.g., quinidine) and timolol. (Timolol label, Drug interactions)

Monitor blood glucose in patients with diabetes and assess if antidiabetic agent dose modifications are required. (Abiraterone label, Warnings and precautions)

For patients who are CYP2D6 poor metabolizers or are taking a strong CYP2D6 inhibitor, dose reduction may be necessary. (Valbenazine label, Warnings and precautions)

Therefore, the potential exists for a drug interaction between drugs that inhibit CYP2D6-mediated metabolism of venlafaxine, reducing the metabolism of venlafaxine to ODV, resulting in increased plasma concentrations of venlafaxine and decreased concentrations of the active metabolite. (Venlafaxine label, Drug interactions)

CYP2D6 Substrates Clinical Impact Viloxazine is a weak inhibitor of CYP2D6, and increases the exposure of CYP2D6 substrates when coadministered [see Clinical Pharmacology (12.3) ] . (Viloxazine label, Drug interactions)

• Strong inhibitors of CYP2D6: Reduce TRINTELLIX dose by half when coadministered ( 2.5 , 7.1 ). (Vortioxetine label, Drug interactions)

CYP2D6 substrates Clinical Impact: In vitro studies indicate that celecoxib, although not a substrate, is an inhibitor of CYP2D6. (Celecoxib label, Drug interactions)

Drugs which inhibit CYP2D6 and CYP3A3/4 also inhibit the metabolism of cevimeline. (Cevimeline label, Drug interactions)

The selective serotonin reuptake inhibitors sertraline (weak CYP3A4 inducer) and fluoxetine (CYP2D6 inhibitor), and the anti-epileptic drug felbamate (CYP2C19 inhibitor and CYP3A4 inducer) do not affect the pharmacokinetics of clonazepam. (Clonazepam label, Drug interactions)

In vitro data suggest that fluvoxamine is a relatively weak inhibitor of CYP2D6. (Fluvoxamine label, Drug interactions)

Because ritonavir is a CYP2D6 inhibitor, clinically significant interactions with drugs metabolized by CYP2D6 are possible when coadministered with fosamprenavir calcium plus ritonavir. (Fosamprenavir label, Drug interactions)

• CYP2D6 inhibitors: As meclizine is metabolized by CYP2D6, there is a potential for drug-drug interactions between meclizine hydrochloride and CYP2D6 inhibitors ( 7.2 ). (Meclizine label, Drug interactions)

Potential for PAXLOVID to Affect Other Drugs PAXLOVID (nirmatrelvir co-packaged with ritonavir) is a strong inhibitor of CYP3A, and an inhibitor of CYP2D6, P-gp and OATP1B1. (Nirmatrelvir and ritonavir label, Drug interactions)

Drugs Metabolized by CYP2D6 Clinical Impact: Sertraline hydrochloride capsules are a CYP2D6 inhibitor [see Clinical Pharmacology ( 12.3 )] . (Sertraline label, Drug interactions)

Strong Inhibitors of CYP2D6 The impact on the efficacy of tamoxifen with co-administration of strong CYP2D6 inhibitors (e.g., paroxetine) is not well established. (Tamoxifen label, Drug interactions)