Interaction Checker

Avanafil interactions

Avanafil (Stendra), a PDE5 inhibitor has 115 documented interactions across the FDA labels and fact sheets we index: 33 major, 82 moderate, 0 minor, and 0 where a label reports no significant interaction. Each entry below quotes the sentence behind it. This drug page is a starting point, not a verdict for your situation.

Major interactions (33)

  • AmiodaroneantiarrhythmicMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • AprepitantCYP3A4 inhibitorMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • CenobamateanticonvulsantMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • CimetidineH2 blockerMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • Clarithromycinmacrolide antibioticMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • CyclosporineimmunosuppressantMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • Diltiazemcalcium channel blockerMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • DronedaroneantiarrhythmicMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • Erythromycinmacrolide antibioticMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • EverolimusimmunosuppressantMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • Fluconazoleazole antifungalMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • ImatinibCYP3A4 inhibitorMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • IsoniazidantibioticMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • Isosorbide dinitratenitrateMajor

    • Administration of avanafil tablet to patients using any form of organic nitrate is contraindicated ( 4.1 ) (Avanafil label, Contraindications)

  • Isosorbide dinitrate and hydralazinenitrateMajor

    • Administration of avanafil tablet to patients using any form of organic nitrate is contraindicated ( 4.1 ) (Avanafil label, Contraindications)

  • Isosorbide mononitratenitrateMajor

    • Administration of avanafil tablet to patients using any form of organic nitrate is contraindicated ( 4.1 ) (Avanafil label, Contraindications)

  • Itraconazoleazole antifungalMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • IvacaftorCYP3A4 inhibitorMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • Ketoconazoleazole antifungalMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • Mirabegronbeta-adrenergic agonistMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • Nirmatrelvir and ritonavirantiviralMajor

    Do not use avanafil in patients taking ritonavir. (Avanafil label, Drug interactions)

  • NitroglycerinnitrateMajor

    • Administration of avanafil tablet to patients using any form of organic nitrate is contraindicated ( 4.1 ) (Avanafil label, Contraindications)

  • PalbociclibCYP3A4 inhibitorMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • PerampanelanticonvulsantMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • Posaconazoleazole antifungalMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • RanolazineQT-prolonging drugMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • RiociguatvasodilatorMajor

    • Administration with guanylate cyclase (GC) stimulators such as riociguat and vericiguat ( 4.3 ) (Avanafil label, Contraindications)

  • RitonavirantiretroviralMajor

    Do not use avanafil in patients taking ritonavir. (Avanafil label, Drug interactions)

  • Suvorexantsedative-hypnoticMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • Ticagrelorantiplatelet agentMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • Verapamilcalcium channel blockerMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

  • VericiguatvasodilatorMajor

    • Administration with guanylate cyclase (GC) stimulators such as riociguat and vericiguat ( 4.3 ) (Avanafil label, Contraindications)

  • Voriconazoleazole antifungalMajor

    Do not use avanafil in patients taking strong CYP3A4 inhibitors [see Warnings and Precautions ( 5.2 ) and Dosage and Administration ( 2.3 )]. (Avanafil label, Drug interactions)

Moderate interactions (82)

  • AlcoholAlcoholModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Alfuzosinalpha blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • AliskirenantihypertensiveModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Amiloridepotassium-sparing diureticModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Amlodipinedihydropyridine calcium channel blockerModerate

    CYP3A4 Substrate When administered with avanafil 200 mg, amlodipine (5 mg daily) increased the C max and AUC of avanafil by approximately 22% and 70%, respectively. (Avanafil label, Drug interactions)

  • Amlodipine and benazeprildihydropyridine calcium channel blockerModerate

    CYP3A4 Substrate When administered with avanafil 200 mg, amlodipine (5 mg daily) increased the C max and AUC of avanafil by approximately 22% and 70%, respectively. (Avanafil label, Drug interactions)

  • Atenololbeta blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Azilsartanangiotensin II receptor blocker (ARB)Moderate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • BenazeprilACE inhibitorModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Bictegravir, emtricitabine, and tenofovir alafenamideantiretroviralModerate

    PDE-5 inhibitors for erectile dysfunction (ED): Refer to the prescribing information of PDE-5 inhibitors for dose recommendations. (Bictegravir, emtricitabine, and tenofovir alafenamide label, Drug interactions)

  • Bisoprololbeta blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Bisoprolol and hydrochlorothiazidebeta blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Candesartanangiotensin II receptor blocker (ARB)Moderate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Cannabidiol (prescription)anticonvulsantModerate

    HIV Protease inhibitor — Ritonavir (600 mg twice daily), a strong CYP3A4 inhibitor, which also inhibits CYP2C9, increased avanafil 50 mg single-dose C max and AUC equal to approximately 2-fold and 13-fold, and prolonged the half-life of avanafil to approximately 9 hours in healthy volunteers. (Avanafil label, Drug interactions)

  • CapecitabineantimetaboliteModerate

    HIV Protease inhibitor — Ritonavir (600 mg twice daily), a strong CYP3A4 inhibitor, which also inhibits CYP2C9, increased avanafil 50 mg single-dose C max and AUC equal to approximately 2-fold and 13-fold, and prolonged the half-life of avanafil to approximately 9 hours in healthy volunteers. (Avanafil label, Drug interactions)

  • CaptoprilACE inhibitorModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Carvedilolbeta blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Chlorthalidonethiazide diureticModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Clonidinealpha-adrenergic agonistModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • DisulfiramCYP2C9 inhibitorModerate

    HIV Protease inhibitor — Ritonavir (600 mg twice daily), a strong CYP3A4 inhibitor, which also inhibits CYP2C9, increased avanafil 50 mg single-dose C max and AUC equal to approximately 2-fold and 13-fold, and prolonged the half-life of avanafil to approximately 9 hours in healthy volunteers. (Avanafil label, Drug interactions)

  • Doxazosinalpha blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Dutasteride and tamsulosin5-alpha reductase inhibitorModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • EnalaprilACE inhibitorModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Eplerenonealdosterone antagonistModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Ethacrynic acidloop diureticModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Felodipinedihydropyridine calcium channel blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • FluvastatinstatinModerate

    HIV Protease inhibitor — Ritonavir (600 mg twice daily), a strong CYP3A4 inhibitor, which also inhibits CYP2C9, increased avanafil 50 mg single-dose C max and AUC equal to approximately 2-fold and 13-fold, and prolonged the half-life of avanafil to approximately 9 hours in healthy volunteers. (Avanafil label, Drug interactions)

  • FosinoprilACE inhibitorModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Furosemideloop diureticModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • GrapefruitFood and drinkModerate

    Although specific interactions have not been studied, other CYP3A4 inhibitors, including grapefruit juice are likely to increase avanafil exposure. (Avanafil label, Drug interactions)

  • Guanfacinealpha-adrenergic agonistModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • HydralazinevasodilatorModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Hydrochlorothiazidethiazide diureticModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Indapamidethiazide diureticModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Irbesartanangiotensin II receptor blocker (ARB)Moderate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Isradipinedihydropyridine calcium channel blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Labetalolbeta blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • LisinoprilACE inhibitorModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Lisinopril and hydrochlorothiazideACE inhibitorModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Lofexidinealpha-adrenergic agonistModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Losartanangiotensin II receptor blocker (ARB)Moderate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Losartan and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • MethyldopaantihypertensiveModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Metolazonethiazide diureticModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Metoprololbeta blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • MetronidazoleantibioticModerate

    HIV Protease inhibitor — Ritonavir (600 mg twice daily), a strong CYP3A4 inhibitor, which also inhibits CYP2C9, increased avanafil 50 mg single-dose C max and AUC equal to approximately 2-fold and 13-fold, and prolonged the half-life of avanafil to approximately 9 hours in healthy volunteers. (Avanafil label, Drug interactions)

  • Miconazoleazole antifungalModerate

    HIV Protease inhibitor — Ritonavir (600 mg twice daily), a strong CYP3A4 inhibitor, which also inhibits CYP2C9, increased avanafil 50 mg single-dose C max and AUC equal to approximately 2-fold and 13-fold, and prolonged the half-life of avanafil to approximately 9 hours in healthy volunteers. (Avanafil label, Drug interactions)

  • MinoxidilvasodilatorModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • MoexiprilACE inhibitorModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Nadololbeta blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Nebivololbeta blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Nicardipinedihydropyridine calcium channel blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Nifedipinedihydropyridine calcium channel blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Nisoldipinedihydropyridine calcium channel blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Olmesartanangiotensin II receptor blocker (ARB)Moderate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • PerindoprilACE inhibitorModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • PhenylephrinedecongestantModerate

    Antagonistic Effects (decrease in BIORPHEN blood pressure effect) can occur with α-adrenergic antagonists, phosphodiesterase Type 5 inhibitors, mixed α- and β-receptor antagonists, calcium channel blockers, benzodiazepines and ACE inhibitors, centrally acting sympatholytic agents. (Phenylephrine label, Drug interactions)

  • Pindololbeta blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Prazosinalpha blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Propranololbeta blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • QuinaprilACE inhibitorModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • RamiprilACE inhibitorModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Sacubitril and valsartanangiotensin II receptor blocker (ARB)Moderate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • SildenafilPDE5 inhibitorModerate

    Prolonged Erection Prolonged erection greater than 4 hours and priapism (painful erections greater than 6 hours in duration) have been reported with other PDE5 inhibitors. (Avanafil label, Warnings and precautions)

  • Spironolactonealdosterone antagonistModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Spironolactone and hydrochlorothiazidealdosterone antagonistModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Sulfamethoxazole and trimethoprimsulfonamideModerate

    HIV Protease inhibitor — Ritonavir (600 mg twice daily), a strong CYP3A4 inhibitor, which also inhibits CYP2C9, increased avanafil 50 mg single-dose C max and AUC equal to approximately 2-fold and 13-fold, and prolonged the half-life of avanafil to approximately 9 hours in healthy volunteers. (Avanafil label, Drug interactions)

  • TadalafilPDE5 inhibitorModerate

    Prolonged Erection Prolonged erection greater than 4 hours and priapism (painful erections greater than 6 hours in duration) have been reported with other PDE5 inhibitors. (Avanafil label, Warnings and precautions)

  • Tamsulosinalpha blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Telmisartanangiotensin II receptor blocker (ARB)Moderate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Terazosinalpha blockerModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Tizanidinemuscle relaxantModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Torsemideloop diureticModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • TrandolaprilACE inhibitorModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Treprostinilprostaglandin analogModerate

    When vasodilators are used in combination, an additive effect on blood pressure may be anticipated. (Avanafil label, Warnings and precautions)

  • Triamterenepotassium-sparing diureticModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Triamterene and hydrochlorothiazidepotassium-sparing diureticModerate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • TrimethoprimantibioticModerate

    HIV Protease inhibitor — Ritonavir (600 mg twice daily), a strong CYP3A4 inhibitor, which also inhibits CYP2C9, increased avanafil 50 mg single-dose C max and AUC equal to approximately 2-fold and 13-fold, and prolonged the half-life of avanafil to approximately 9 hours in healthy volunteers. (Avanafil label, Drug interactions)

  • Valsartanangiotensin II receptor blocker (ARB)Moderate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • Valsartan and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    • Use of avanafil with alpha-blockers, other antihypertensives, or substantial amounts of alcohol (greater than 3 units) may lead to hypotension ( 2.3 , 5.6 , 5.7 ) (Avanafil label, Warnings and precautions)

  • VardenafilPDE5 inhibitorModerate

    Prolonged Erection Prolonged erection greater than 4 hours and priapism (painful erections greater than 6 hours in duration) have been reported with other PDE5 inhibitors. (Avanafil label, Warnings and precautions)

  • Zafirlukastleukotriene receptor antagonistModerate

    HIV Protease inhibitor — Ritonavir (600 mg twice daily), a strong CYP3A4 inhibitor, which also inhibits CYP2C9, increased avanafil 50 mg single-dose C max and AUC equal to approximately 2-fold and 13-fold, and prolonged the half-life of avanafil to approximately 9 hours in healthy volunteers. (Avanafil label, Drug interactions)

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Not medical advice. Severity reflects the label's wording, not your circumstances. A "major" flag can be routine under supervision and a "minor" one can matter at high doses. Ask a pharmacist.