It's the side effect people joke about — right up until it actually happens. An erection that simply won't go down sounds like a comedy line, but a Kamagra-related erection lasting more than four hours is no punchline. It's a genuine medical emergency called priapism, and it's one of the very few sildenafil situations where every single hour truly counts.

What's Actually Going Wrong

Normally, once arousal passes, blood drains out of the penis and the erection subsides. In priapism — specifically the dangerous, common form known as ischemic priapism — that blood gets trapped and can't leave. Stuck in place, it gradually runs out of oxygen and turns acidic, and the starved erectile tissue begins to suffer for it. It's less "an unusually good erection" and more like a sealed compartment slowly being deprived of what it needs to survive. That's why it hurts, and why it's an emergency rather than a curiosity.

Why the Clock Matters So Much

This is the reason four hours is a hard line rather than a loose guideline. Tissue damage can begin within around six hours, and it only worsens from there — push toward a full day or beyond, and the risk of permanent, irreversible erectile dysfunction climbs steeply. Treated promptly, the outlook is usually good. Left to "sort itself out" overnight, priapism can cost you the very function the pill was meant to restore. The damage is time-dependent, which means delay is the enemy.

What to Do

There is no clever home remedy here, and no version of embarrassment worth trading tissue for. If an erection lasts beyond four hours, go to the nearest emergency department. Doctors can drain the trapped blood and use medication to bring things down, and these measures work best the earlier you arrive. The single most important decision is the simplest one: don't wait and hope it passes. Going in at hour five is a vastly better story than going in at hour twenty.

Who's at Higher Risk

None of this means you should fear the pill. At normal prescribed doses in healthy men, priapism is genuinely uncommon. The risk rises in specific circumstances: taking too high a dose, stacking two ED drugs together, combining sildenafil with certain other medicines such as some antidepressants and antipsychotics or with recreational drugs, and — most importantly — having a blood condition, above all sickle cell disease, where priapism can even be the first warning sign. Anyone with sickle cell or a related disorder should use sildenafil only with medical guidance. For more on when a prolonged erection becomes an emergency, the detailed guide is a useful reference.

So what should you do if an erection lasts more than four hours? Treat the four-hour mark as a fire alarm, not a maybe — get to an emergency room without delay. And on the prevention side, the rules are quiet but real: stick to the dose you were prescribed, never stack or exceed it, and make sure a doctor knows about any blood conditions and the other medicines you take before you start. That last check is exactly the one that buying Kamagra without a prescription removes — which is precisely why, with a grey-market pill, knowing the four-hour rule yourself matters more than ever.