Does Viagra Keep You Hard After Climax?

Many men wrongly believe that erectile dysfunction (ED) medications like Viagra^®, Cialis^®, or Levitra^® can cause erections without sexual stimulation. And some men even mistakenly think that these drugs can make their penis bigger.

But does Viagra keep you hard after climax, or is that a myth, too?

Believing drugs like Viagra can help you maintain an erection after ejaculation isn’t an unfair assumption, especially given that the US Food and Drug Administration (FDA) warns of four-hour erections right on the label. Between the urban legends and the horror stories, it’s no wonder that a guy who’s not already taking “the little blue pill” might misunderstand what it does and doesn’t do.

Let’s clear up a few of these misconceptions. Below, we’ll explain why taking Viagra is an effective treatment for ED, why it’s typically difficult to get hard again after ejaculating, and whether a dose of Viagra can speed up the process.

Viagra (the brand-name version of sildenafil citrate) and a number of other oral ED treatment medications belong to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors. They are designed to treat erectile dysfunction by keeping you harder for longer, and they’re effective at doing so. 

Viagra and other PDE5 inhibitors work by blocking an enzyme called PDE5 produced in your tissues. This blockage allows your blood vessels to relax and widen, which increases blood flow to your penis. In fact, Viagra was first created as a treatment for chest pain and hypertension, but researchers soon found that the active ingredient increases blood flow to the penis, too. 

Though it can help folks with ED maintain an erection hard enough for penetration, Viagra isn’t a promise for good sex. It won’t fix performance anxiety (though it can help), and it can’t increase your sex drive.

By continually increasing blood flow to the penis, Viagra gives you a window of several hours (up to four) in which you can get hard with addition of sexual stimulation. 

However, just because Viagra can work up to four hours doesn’t mean you’re guaranteed to maintain an erection for four hours straight. Erections lasting longer than four hours could signal the presence of priapism, a medical condition that can cause permanent, irreversible damage to your penis. 

Before we move on to whether or not Viagra can keep you hard after climax, we need to explain why your erection goes away after ejaculation in the first place.

All good things must come to an end.

Every male orgasm is immediately followed by the refractory period — a sort of reset-and-reboot phase after sexual intercourse. During the refractory period, your penis could still be harder than usual but — generally — you are not responsive to sexual stimuli, and it is impossible to orgasm again. 

Some guys have a refractory period that lasts a few minutes and for others, it’s more like a few hours. Every guy is different, and more research is needed to fully understand the specific functions of the refractory period. 

What we do know is that the refractory period may get longer as you age. The nearly nonexistent teen refractory phase becomes longer sometime in your 20s, and your reboot gets longer as time passes.

Okay, we’re ready to answer the big question on your mind: Does Viagra work to help you skip the refractory period entirely? No, it doesn’t. Can it shorten the refractory period? Maybe.

Even so, if you’re thinking about using your Viagra—or even someone else’s prescription medication or a non-prescription “sexual enhancement” supplement—to go all night, we’ve got some advice for you: reconsider. 

First of all, it’s not safe to take a drug that isn’t prescribed to you, and those over-the-counter enhancement supplements may do more harm than good.

Second, although experts have conflicting ideas about what the refractory period is, why it exists, and how long it lasts, most agree it doesn’t go away entirely.

That said, some evidence suggests sildenafil may reduce the refractory period.

Research on Viagra and the Refractory Period

An eight-week study of men between the ages of 18 and 65 who had premature ejaculation (PE) found that those who took sildenafil saw a decrease in their refractory time.

An older study of 20 men also found that sildenafil reduced the refractory period in all subjects. Men who took sildenafil had a refractory period many minutes shorter than men who took the placebo.

And yet another study found that while sildenafil may prolong sexual activity, which could be helpful for men with premature ejaculation, it didn’t appear to shorten the refractory period after ejaculation.

The bottom line? Your refractory period isn’t going anywhere, but you can potentially shorten it.

If you decide to try to shorten your refractory period with Viagra, there is a serious side effect to look out for: an erection that lasts too long. Be sure to contact your healthcare provider if you have an erection lasting longer than four hours, which can be a sign of priapism.

Also, remember that the drug’s purpose isn’t to kill your refractory period, and using it just for this reason could increase the risk of side effects like chest pain, blurred vision, and dangerously low blood pressure.

Do Other PDE5 Inhibitors Keep You Hard After Coming?

Viagra aside, can similar ED drugs work the same way? For instance, does Cialis (brand-name tadalafil) keep you hard after ejaculation? What about Levitra (vardenafil)?

A study of tadalafil for premature ejaculation found that the drug may also reduce refractory time after orgasm, but more research is needed to confirm the finding.

Another study on vardenafil and premature ejaculation concluded that the drug reduced refractory time while extending the length of sex and improving sexual satisfaction and confidence.

Again, none of these studies found that PDE5 inhibitors stopped the refractory period entirely. But, they do appear to have the potential to shorten it for some men.

While Viagra doesn’t stop working after ejaculation, it won’t give you a four-hour erection (if it does, you should seek the help of a healthcare provider). In fact, while using Viagra and sildenafil for the treatment of erectile dysfunction is safe, taking the medication for recreational reasons can be dangerous. 

We say this mainly as a disclaimer: When people ask “Does Viagra keep you hard after coming?”, they should actually be seeking medical advice for ED — a widespread issue that affects millions of men worldwide — or premature ejaculation, not a stamina power-up.

That’s because erectile dysfunction medication is designed to treat that condition, not enhance sexual performance when no functional issue is present. Remember:

• If you’re struggling to get hard, stay hard, and finish hard, you should talk to a healthcare provider about ED medication or other treatment options. You can solve many problems related to erectile function with the support of a medical professional. Be sure to disclose any health conditions like heart disease or mental health issues that may be affecting your sexual satisfaction. And be as honest as possible

• Viagra and similar drugs may shorten your refractory period, but that post-climax rest period won’t go away completely. Some studies show that Viagra may speed up your refractory period, especially in those with premature ejaculation.

• Overdoing it with Viagra to try to skip your refractory period is dangerous. Too much Viagra can lead to a higher risk of side effects or drug interactions. 

Viagra also shouldn’t be taken with certain medications, like nitrates or alpha-blockers, which increase the risk of side effects. You can read more in our guide to the side effects of Viagra.

And if you don’t want to talk live with a healthcare provider about a potential sexual dysfunction, consider having the conversation remotely by getting medical advice for your sex life online.

Find out more about how to use Viagra for the best results and the risks of taking Viagra without ED.