MenHaveOptions.com · Health guides
ED treatment options compared
The four oral medicines differ mainly in how fast they work and how long they last. What the guidelines say, how the options compare, and the safety issue that matters most.
Most men with erectile dysfunction are treated first with a tablet from a single drug class. The American Urological Association’s guideline is direct about it: PDE5 inhibitors are the recommended first-line therapy for most men with ED.
There are four in common use. They work by the same mechanism. The practical differences are timing, duration and side-effect profile.
The four oral options
| Medicine | Typical onset | Duration of effect | Usual dosing |
|---|---|---|---|
| Sildenafil | 30–60 minutes | About 4 hours | As needed, before sex |
| Tadalafil | 30–60 minutes | Up to about 36 hours | As needed (10–20 mg) or daily (2.5–5 mg) |
| Vardenafil | Can act within ~10 minutes | Several hours | As needed |
| Avanafil | Fast onset | Several hours | As needed |
Sildenafil is the oldest and best studied. Its effect window is comparatively short, which suits planned occasions.
Tadalafil is the outlier, and for many men the more comfortable option. A single dose leaves you responsive for up to around 36 hours, which removes the need to time anything. It is also the only one routinely prescribed as a low daily dose, which decouples treatment from sex entirely.
Vardenafil has the fastest reported onset of the group.
Avanafil is the newest, also fast-acting.
The AUA guidance is that choice between agents should follow patient preference, how often you have sex, and your other medical conditions, not a ranking. There is no single best one.
What matters more than which tablet
Nitrates are an absolute contraindication. Taking any PDE5 inhibitor with nitrate medication (including nitroglycerin for angina, and including as-needed sprays) can cause a dangerous drop in blood pressure. This is not a precaution to weigh up. It rules the whole class out, and it is the single most important thing on this page.
ED is frequently an early cardiovascular sign. The blood vessels involved are small and are often affected before larger ones. New erectile dysfunction, particularly in a man under 60, is a reason to have blood pressure, lipids and glucose checked. Treating the symptom while ignoring what it may indicate is the most common mistake in this category.
Cardiac safety of the drugs themselves is generally good, including in men with a history of cardiovascular disease, provided nitrates are excluded and the prescriber knows the full medication list. QTc effects differ slightly between agents, with the longest reported for vardenafil and the shortest for tadalafil.
Alpha-blockers, some antifungals and some HIV medicines interact and may require dose adjustment. Your prescriber needs the complete list, including anything bought over the counter.
If tablets do not work
They do not work for everyone, and “did not work” often means “was not used correctly.” Before moving on, check that the dose was adequate, that it was tried on several occasions, that timing and food effects were right, and that sexual stimulation was present: these medicines enable a response, they do not create one.
If the class genuinely fails, the recognised next steps include vacuum erection devices, intracavernosal injection therapy, intraurethral alprostadil, and penile implants for men in whom other options have failed. Where a hormonal or psychological cause is identified, treating that directly may be more effective than any of the above.
Getting a prescription
These are prescription medicines everywhere they are legal, and they are not controlled substances, which is why telehealth handles them straightforwardly. A legitimate service will take a medication history, ask specifically about nitrates and cardiac history, and have a licensed prescriber in your state review it. Anything selling them without those steps is not operating lawfully.