Vardenafil
most data
The Dose Guy’s verdictOct 27, 20264 sources
Yes, it works. Vardenafil does what sildenafil does at a fraction of the milligrams, with a similar few-hour window and the same timing game. There’s nothing wrong with it; there’s just no reason for it to unseat tadalafil as your default. Reach for it when sildenafil disagrees with you or misses and you still want a short, sharp, on-demand pill.
What it is
Vardenafil is a PDE5 inhibitor, the same class as sildenafil and tadalafil. PDE5 is the enzyme that winds an erection down by breaking down cGMP, the messenger that keeps the blood vessels in the penis relaxed and filling. Block the enzyme and the signal lasts. Arousal still has to start it; no PDE5 creates desire. Chemically vardenafil is a near-twin of sildenafil and more potent per milligram, so 10 mg does roughly what 50 mg of sildenafil does, over a similar span: a few good hours, not tadalafil’s day and a half.
It’s the quiet middle child of the class. Some men simply respond to or tolerate one of the short-acting pair better than the other, and that’s the whole case for keeping vardenafil in the drawer. For daily use, or for the gym crowd chasing the blood-flow pump, tadalafil is the tool; vardenafil is built for the occasion.
What the research shows
Decades of large, clean trials. Whether vardenafil works was settled long ago; the useful numbers are how much, at what dose, and at what cost:
Realistic protocols
Start at 10 mg, 30 to 60 minutes before sex. That’s the workhorse, and the trials back holding it, since 20 mg didn’t beat 10 on average. Treat 20 as the dose for the man whom 10 genuinely failed after a few honest tries, not as the next rung. If 10 brings a pounding head or a stuffed nose, drop to 5; plenty of men find 5 enough. Over 65, start at 5. On a drug that blocks the CYP3A4 liver enzyme, the label caps it much lower: one 2.5 mg dose every 72 hours with ritonavir, one 2.5 mg dose a day with clarithromycin, the other HIV protease inhibitors, or ketoconazole and itraconazole at 400 mg, and one 5 mg dose a day with erythromycin or those antifungals at 200 mg. Grapefruit juice pushes levels up too, more gently.
Like sildenafil, it gets slowed by a heavy, fatty dinner, so take it a little earlier or eat lighter. A couple of drinks is fine. Real drinking blunts erections on its own and stacks with the drug’s mild blood pressure dip, which is how you end up dizzy on the stand-up. On an alpha-blocker for your prostate or blood pressure, start at 5 and keep the two stable before you push anything.
The hard rule, same as every PDE5: never with nitrates, meaning nitroglycerin, isosorbide or poppers, or with riociguat, a lung blood-pressure drug. The combined blood pressure drop can kill.
Side effects
The standard PDE5 profile, worn a little louder than its siblings:
