Couple sitting together.

Does Viagra Increase Penis Size?

Highlights

  • Viagra doesn’t increase penis size, but it does give you firmer erections that may feel larger and will last longer.
  • Many ads for questionable supplements and devices attempt to manipulate your insecurities. It’s best to ignore them.
  • Working to accept your body and what your partner wants in the bedroom will be more effective for feeling confident in your penis.

Dr. Michael DiLeo
Latest posts by Dr. Michael DiLeo (see all)

Doctors are often asked “Does Viagra increase penis size?” The answer is no, but it will help make the most of what you have naturally. There’s no need to worry so much about it. Penis size doesn’t matter that much to women in the long run, and the average size may be smaller than you think. [Español]

We know that men of all ages have a lot of concerns about penis size and sex, but it’s awkward to talk about in a doctor’s appointment. So one of the doctors at eDrugstore.com has taken time out from his busy urology practice to answer a few questions from our readers about some of the topics men may hesitate to discuss with their doctors. Read and learn.

I am a 45-year-old man and I keep getting emails asking me if I want a bigger penis and trying to sell me discount Viagra. Does Viagra really increase the size of my penis? – Slight in Seattle

Dear Slight:

I do understand your concern, and rest assured, you share it with millions of other men around the world.

First, let me clarify that Viagra doesn’t increase the size of your penis and has never been intended to do so. In fact, Viagra was discovered by accident while researchers were investigating treatments for angina.

Viagra is an erectile dysfunction treatment that helps men who suffer from impotence. They take Viagra to help them get an erection and keep it up long enough to finish having sex.

Some people assume that Viagra increases the size of your penis long term because the penis grows during an erection, and Viagra helps you get an erection. But this is a bit of a simplification.

Viagra gives you stronger, fuller erections. So compared to before you started taking it, especially if you were struggling with ED for a long time, your penis probably looks and feels bigger. But healthy erections are what do that, which is the only thing Viagra can do. Simply, a fully erect penis is larger than one that isn’t.

All that’s happening is that Viagra is helping the blood vessels in your penis fill to maximum size. The more blood in your erection, the larger your penis is.

What Viagra is not doing is changing your anatomy. It won’t magically endow you with extra length or girth you don’t have. A full erection, however, makes the most of what you do have.

Viagra is an effective treatment because it also increases your ability to maintain an erection longer before ejaculation. That can be beneficial because sometimes women need a bit more time to reach orgasm. 

Bottom line: Viagra can help maximize your natural size due to the fullness of your erection, but your non-erect size will not be affected.

And as an aside, those emails you get come from unethical people and may be hazardous to your computer if you open any attachments they include. Worse, ultimately they could be hazardous to your health, should you try any of the “snake oil” cures they offer. Your best approach is to delete them unread.

What is the average penis size for a 16-year-old male and how do you measure it? Will I ever get a big penis? When does it stop growing? – Robin

Dear Robin:

You asked some good questions about penis size that I’m sure many young men like yourself wonder about. Let’s take them one at a time.

What is the average penis size?

First, let’s not forget that penis size includes length AND width. According to one of the more comprehensive studies on penis size, done in the late 1990’s, the average erect length for an adult man is 12.9 centimeters, or just over 5 inches. The average girth is 12 centimeters, or 4.7 inches. Interestingly, the study cited here states, “Stretched length most closely correlated with erect length.” That is, it can only get so big, realized by a full healthy erection.

How do you measure penis size?

For complete accuracy, you measure the penis when it’s erect and while you’re standing up. The penis length is measured along the top, from the base to the tip (with no manual stretching). Measure right from the bone at the base of the penis and, very importantly, depress the fat pad at the base. The width is measured by wrapping the tape around the circumference of your erect penis at the midpoint.

When does the penis stop growing?

The penis stops growing when you do! At the start of puberty, the penis is just a few inches long, but over the next five years, it has a growth spurt just like the rest of a teenager’s body and reaches its maximum size. So it’s impossible to say what the average size is for a 16-year-old boy. But if you are still getting taller, your penis may yet get larger.

Is having a small or big penis genetic?

Yes. If the men in your family have big penises, you likely will too. Penis size is determined purely by heredity. (The only exception is a hormonal condition called micropenis, which is very rare.) If your brother is telling the truth (though I’m not sure I’d trust any man who brags about his penis size), you should be in good shape.

And in case you are still worried about it, you should know that most women don’t care that much. Another study found that only a minority of women (15 percent) are dissatisfied with their partner’s size, and that includes women who think their partner’s penis is too large (which happens more often than you’d think).

Consider that the vagina is normally collapsed and that a woman’s perception of insertion is not determined by penis size, but only by the feeling of distension of the vaginal sidewalls. 

Banana.

I don’t have a big penis, just normal size. My friends keep telling me size does matter. But my girlfriend says, “It isn’t what you have, but how you use it.” What’s the real truth — is a bigger penis better when it comes to great sex? – Digger

Man peaking under his own blanket.

Dear Digger:

Sounds to me like you have a mild case of “small penis syndrome.” This is when a man feels anxious about his penis size even when everybody else is telling him it’s just fine.

Believe it or not, some researchers hypothesize that this anxiety is caused by a mismatch between the mating habits of ancient and modern humans. Penis size never mattered much to women in ancestral societies because women often didn’t have their choice of mate. Today, women (rightfully!) have more freedom of choice, which generates a lot of performance anxiety that can manifest in size worries.

So the feeling is normal, and one that many men experience. Don’t get hooked by all the advertising for miracle penis enlargers that try to make you feel inadequate. They don’t do anything except give you doubts about yourself and your penis size.

And there’s little sense in wishing for an enormous penis. A 10-inch organ might get you into the porn industry, but it will be very uncomfortable or painful for some partners during sex.

In general, I would listen to whoever you’re dating rather than your guy friends. After all, the size of your penis is far more likely to be relevant to your relationship with your girlfriend than to your friends — so listen where it matters.

Worrying can actually make matters worse! It won’t actually decrease your size, but men with size anxiety are shown to have more difficulties with performance down the line. So the whole issue is a self-fulfilling prophecy.

As long as whatever you have is performing well and you aren’t having any issues in your relationship, ignore your guy friends.

Learn to separate fact from fiction, and you’ll save yourself a lot of unproductive stress over things that you can’t control and things that ultimately don’t matter much. 

Focus on What You Can Control

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