Phosphodiesterase type 5 (PDE5) inhibitor
Avanafil and cannabis (marijuana, THC)
As cannabis becomes legal or decriminalised in more jurisdictions, the practical question of combining it with prescription medication comes up regularly. Avanafil (Avanafil) and cannabis share several pharmacological pathways, and the combination at 50mg, 100mg, 200mg is not automatically benign even where both are legal.
How cannabis affects Avanafil
THC and other cannabinoids are metabolised partly by hepatic CYP enzymes, including CYP3A4 — the same pathway used by many Phosphodiesterase type 5 (PDE5) inhibitor medications. Frequent cannabis use can shift the metabolism of Avanafil mildly. THC also has cardiovascular effects (increased heart rate, blood pressure changes) and central nervous system effects that can stack with Avanafil's side-effect profile.
Practical guidance
Occasional moderate cannabis use is unlikely to cause clinically meaningful problems for most adults on Avanafil at 50mg, 100mg, 200mg. Heavy daily use, edibles with high THC content, or cannabis combined with alcohol substantially raise the risk of dizziness, hypotension, impaired judgement and amplified side effects from Avanafil. According to the prescribing information, the full list of recreational substances should be disclosed to the prescriber.
Frequently asked questions
Can I use cannabis while taking Avanafil? ▾
For most adults at 50mg, 100mg, 200mg, occasional moderate cannabis is tolerated, but heavy daily use is not advised because of metabolic and additive cardiovascular effects with Avanafil. The safe practice is to mention it to the prescriber.
Does CBD interact with Avanafil? ▾
CBD inhibits several CYP enzymes including CYP3A4, which can raise plasma levels of medications that go through that pathway. For Avanafil specifically, this depends on whether Avanafil uses CYP3A4. Daily high-dose CBD products warrant a pharmacist check.
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?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.