Can Viagra make you bigger?

Wondering if Viagra can actually make you bigger? You’re not alone—this is a common question with plenty of myths swirling around. In this blog, we’ll clear up the confusion by explaining how Viagra works, what it really does to your body, and why size isn’t the whole story. Whether you’re curious or considering trying it, this guide will give you the facts in a straightforward, no-nonsense way—plus a little confidence boost along the way.

Key takeaways

• Viagra doesn’t permanently increase penis size, but it can help you achieve your fullest erection [3].
• The average erect penis size falls between 5.1 and 5.5 inches [5].
• Viagra works by boosting blood flow, making erections firmer and more reliable [2].
• No pill, cream, or supplement can make your penis permanently bigger—beware of scams [9].
• Confidence and communication matter more than size for most partners [9].

What is the average penis size?

Let’s start with a question that’s crossed nearly every man’s mind. Studies show the average erect penis is between 5.1 and 5.5 inches (about 13–14 cm)  [5]. Most men are actually within this range, but thanks to the internet, advertising, and, let’s be honest, a bit of locker-room bravado, plenty of us think we’re below average when we’re not!

If you’re curious, measure your penis while standing, from the base to the tip, during an erection. Remember, the numbers are just averages—real satisfaction comes from confidence and connection, not centimetres  [5].

Why does your penis stop growing?

Penis growth is mostly determined during puberty, triggered by a surge in testosterone. By your late teens, you’ve reached your adult size [6]. This growth spurt is normal, and after puberty, no amount of pills, potions, or protein shakes will make it grow further. Genetics, hormones, and childhood health all play a role, but after adolescence, your size is set [6].

How does an erection occur?

An erection is all about blood flow. When you’re aroused, your brain sends signals that relax blood vessels in the penis, allowing blood to rush in and fill the spongy chambers [7]. The penis swells and stiffens—think of it as a natural hydraulic system. The veins that usually drain blood from the penis are compressed, helping keep things firm until you’re done [7].

How does Viagra work?

Viagra (sildenafil) is a PDE5 inhibitor, which blocks an enzyme that normally causes erections to fade by breaking down the compound cGMP. When you’re sexually aroused, Viagra helps keep blood flowing in by preventing the breakdown of cGMP so that you can achieve and maintain a firmer erection [2], [3], [4]. It doesn’t create an erection out of thin air—you still need to be turned on—but it can help if you’re struggling to get or keep one [2].

Can Viagra make you bigger during sex?

Viagra doesn’t make your penis physically bigger, but it can help you reach your full erect size by improving blood flow [3]. If you’ve struggled with weak erections, it may seem bigger simply because you’re achieving your natural potential. Think of it as helping you get the best out of what you already have.

Is Viagra an aphrodisiac?

Viagra doesn’t boost libido—it helps with the mechanics, not the desire. You still need to be turned on for it to work [3]. For many men, knowing their body will respond can boost confidence, which in turn can make sex more enjoyable.

The dangers of a prolonged erection

Priapism (an erection lasting more than 4 hours) is rare but serious. If it happens, seek help immediately to avoid permanent damage [8]. Don’t try to wait it out—this is one time when “longer” isn’t better.

Do women prefer a big penis?

Research suggests that most women are satisfied with their partner’s size, and communication and confidence are far more important [9]. A large survey found that while many men wish they were bigger, most women are satisfied—and only a tiny fraction want their partner to be smaller [9].

So, will Viagra make you bigger?

In short, Viagra can help you achieve a firmer, fuller erection, but it won’t make your penis permanently bigger. The key is improved blood flow, which can make your erection appear more prominent and stronger when aroused. If you’re wondering if sildenafil can make you bigger permanently, the answer is no. No pill can do that, and any product claiming to increase your penis size should be approached with caution [9].

Frequently asked questions

Does Viagra make your penis grow permanently?

No, it only helps you reach your natural erect size.

Can Viagra make sex better?

It can help you maintain a firmer erection, which may boost confidence and satisfaction.

Is it safe to buy Viagra online?

Only buy from a registered pharmacy, such as courierpharmacy.co.uk.

What if I’m still worried about size?

 Talk to a healthcare professional for honest advice and support.

Do penis pumps or extenders work?

There’s limited evidence, and they come with risks—don’t use anything without medical guidance.

Disclaimer: This article is for informational purposes only and does not replace professional medical advice.

References

1. NHS (2023) ‘Erection problems (erectile dysfunction)’. Available at: https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/ (Accessed: 24 September 2025).-1
2. BNF (2025) ‘Sildenafil’. Available at: https://bnf.nice.org.uk/drugs/sildenafil/ (Accessed: 24 September 2025).-2
3. EMC (2025) ‘Sildenafil 100mg Tablets – Summary of Product Characteristics (SmPC)’. Available at: https://www.medicines.org.uk/emc/product/7124/smpc (Accessed: 24 September 2025).-3
4. Courier Pharmacy (2025) ‘How long does sildenafil last for and how long does it take to work?’ Available at: https://courierpharmacy.co.uk/how-long-does-sildenafil-last-for-and-how-long-does-it-take-to-work/ (Accessed: 24 September 2025).-4
5. Wessells, H., Lue, T. F., & McAninch, J. W. (1996). Penile length in the flaccid and erect states: guidelines for penile augmentation. The Journal of Urology, 156(3), 995-997. https://pubmed.ncbi.nlm.nih.gov/8709407/- 7
6. Wang YN, Zeng Q, Xiong F, Zeng Y. Male external genitalia growth curves and charts for children and adolescents aged 0 to 17 years in Chongqing, China. Asian J Androl. 2018 Nov-Dec;20(6):567-571. https://pubmed.ncbi.nlm.nih.gov/30131952/-8
7. Liu, J.L., Burnett, A.L. and Herati, A.S., 2023. Molecular Biology and Physiology of Erectile Function and Dysfunction. Men’s Reproductive and Sexual Health Throughout the Lifespan: An Integrated Approach to Fertility, Sexual Function, and Vitality, p.289. https://link.springer.com/chapter/10.1007/978-3-031-25440-2_13-10
8. Gregory A. Broderick, Ates Kadioglu, Trinity J. Bivalacqua, Hussein Ghanem, Ajay Nehra, Rany Shamloul, Priapism: Pathogenesis, Epidemiology, and Management, The Journal of Sexual Medicine, Volume 7, Issue 1_part_2, January 2010, Pages 476–500. https://www.jsm.jsexmed.org/article/S1743-6095(15)33863-8/fulltext-12
9. Lever, J., Frederick, D.A. and Peplau, L.A., 2006. Does size matter? Men’s and women’s views on penis size across the lifespan. Psychology of Men & Masculinity, 7(3), p.129. https://psycnet.apa.org/record/2006-06714-001-13