Vardenafil and smoking: how tobacco affects the medication
Tobacco smoking is one of the most underappreciated drug-drug interactions in chronic medication. Compounds in tobacco smoke induce hepatic enzymes (especially CYP1A2) and can shift the plasma concentration of many medications, including Vardenafil (Vardenafil), enough to matter clinically at 5mg, 10mg, 20mg.
How smoking affects Vardenafil
Polycyclic aromatic hydrocarbons in tobacco smoke induce CYP1A2 and to a lesser extent other CYP enzymes. For medications metabolised primarily by CYP1A2, smokers can have plasma levels 30–50% lower than non-smokers at the same dose. Whether Vardenafil is affected depends on its specific metabolic pathway. The mechanism is identical to original Levitra: vardenafil selectively inhibits PDE5 in penile smooth muscle, allowing cyclic GMP produced during sexual arousal to accumulate.
Practical guidance
According to the prescribing information for Vardenafil, smoking status should be disclosed at every dose review of Vardenafil. Stopping smoking can paradoxically raise plasma levels of CYP1A2-metabolised medications enough to cause new-onset side effects within days, and may require a temporary dose reduction. The 5mg, 10mg, 20mg starting strength assumed in the prescribing information is usually for non-smokers.
Frequently asked questions
Does smoking change how Vardenafil works? ▾
For medications metabolised by CYP1A2, yes — smokers may need higher doses or have reduced effect at standard 5mg, 10mg, 20mg. Whether Vardenafil specifically is affected depends on whether Vardenafil uses CYP1A2. The prescribing information notes any documented interaction.
Will I need to adjust Vardenafil if I quit smoking? ▾
Possibly, if Vardenafil is one of the medications affected by CYP1A2 induction. Stopping smoking restores CYP1A2 to normal within days, raising plasma levels and potentially causing side effects. Discuss the timing of any dose adjustment with the prescriber when planning to quit.
More on Vardenafil
- With alcoholVardenafil and alcohol — is it safe to drink?
- With foodShould Vardenafil be taken with food?
- Side effectsVardenafil side effects: common, rare and warning signs
- Dosage guideVardenafil dosage guide: how much to take and when
- OnsetHow fast does Vardenafil start working?
- DurationHow long does Vardenafil last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.