Phosphodiesterase type 5 (PDE5) inhibitor
Avanafil with liver impairment: dosing and safety
The liver is the main site of metabolism for many medications including Avanafil (Avanafil). Liver impairment slows clearance and can raise plasma levels of Avanafil above the intended range, amplifying side effects. People with chronic liver disease, recent hepatitis or significantly raised liver enzymes need a tailored approach to Avanafil at 50mg, 100mg, 200mg.
Why liver function matters
Avanafil undergoes hepatic metabolism through CYP enzymes for many medications. Reduced hepatic function slows this metabolism, prolongs the half-life and raises plasma concentrations. Avanafil selectively inhibits phosphodiesterase type 5 (PDE5) in the corpus cavernosum, increasing cGMP and enhancing nitric-oxide-mediated vasodilation in response to sexual stimulation. The prescribing information typically classifies severity by Child-Pugh score (A mild, B moderate, C severe) and gives dose adjustments accordingly.
Practical guidance
According to the prescribing information for Avanafil, baseline liver function tests are recommended before starting Avanafil in any patient with risk factors and periodically during treatment in chronic liver disease. Severe impairment (Child-Pugh C) often contraindicates Avanafil or requires substantial dose reduction; mild impairment usually permits standard 50mg, 100mg, 200mg with closer monitoring.
Frequently asked questions
Is Avanafil safe with liver problems? ▾
Mild liver impairment typically allows Avanafil at standard or slightly reduced 50mg, 100mg, 200mg with monitoring. Moderate-to-severe impairment often requires substantial dose reduction. Severe (Child-Pugh C) impairment may contraindicate Avanafil entirely.
Will Avanafil damage my liver? ▾
Most Phosphodiesterase type 5 (PDE5) inhibitor medications at standard 50mg, 100mg, 200mg doses do not harm a healthy liver. A small subset can produce drug-induced liver injury in susceptible patients, usually detected by routine ALT/AST monitoring. The prescribing information for Avanafil lists the documented risk.
Products containing Avanafil
More on Avanafil
- With alcoholAvanafil and alcohol — is it safe to drink?
- With foodShould Avanafil be taken with food?
- Side effectsAvanafil side effects: common, rare and warning signs
- Dosage guideAvanafil dosage guide: how much to take and when
- OnsetHow fast does Avanafil start working?
- DurationHow long does Avanafil last?
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