Men taking Ozempic for weight loss are reporting a surprising side effect – their penises appear larger. This phenomenon, dubbed “Ozempic penis” or “Ozemdick” by users, has gained attention as more people share their experiences online.
“I recently measured myself down there and noticed I gained about one inch,” one anonymous user wrote on Reddit. Another claimed even more dramatic results: “I gained 1.5 inches in length. No joke.”
These reports are largely from online forums where men discuss changes they’ve noticed after taking GLP-1 medications like Ozempic (semaglutide) and Tirzepatide.
What’s Really Happening?
The apparent increase in penis size isn’t because the medication makes the organ grow. Instead, it’s primarily related to weight loss and improved health.
When men lose significant weight, especially around the abdomen and pubic area, more of the penis becomes visible. Fat that previously surrounded the base of the penis decreases, making it appear longer. This optical effect is well-documented with any substantial weight loss, regardless of how it happens.
Some users acknowledge this explanation. “Wife has definitely noticed a difference, was 278lbs down to under 200 lbs,” commented one Reddit user, suggesting the visual difference comes from overall body changes.
Beyond this optical effect, GLP-1 drugs may indirectly benefit erectile function through several mechanisms:
- Improved blood flow: These medications help control blood sugar and reduce cardiovascular risk factors, potentially enhancing blood circulation to the penis.
- Hormonal changes: Obesity often lowers testosterone levels. As men lose weight, testosterone typically increases, which can improve sexual function.
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Is It Permanent?
The changes men are experiencing appear to be linked to continued weight management. If someone stops taking Ozempic and regains weight, particularly around the pubic area, the visual benefits would likely reverse.
Dr. Richard Viney explained to Diabetes.co.uk: “Men’s penises shorten as they get older due to increasing body fat and increasing prostate size drawing the penis back into the body. It is theoretically possible new drugs like Ozempic and Wegovy, which are used to treat diabetes and obesity respectively and can cause people to lose weight, could also be a factor. As men lose weight, their penises appear larger.”
Beyond Size: Other Sexual Health Considerations
The focus on penis size overshadows other aspects of male sexual health potentially affected by GLP-1 medications:
- Some men report changes in sex drive, with responses varying widely.
- The rapid weight loss from these medications can affect body image and confidence, which play important roles in sexual satisfaction.
- The common side effects of Ozempic (nausea, fatigue) may temporarily decrease interest in sex.
Research specifically examining Ozempic’s direct impact on male sexual function remains limited. Clinical trials for semaglutide don’t list erectile dysfunction or penile changes as common side effects.

Pharmacist Navin Khosla offers perspective: “While the data is interesting, penis size doesn’t matter in a medical sense. Just like how some people prefer different fashion styles, eye colours, or characteristics in a partner, some people are more attracted to larger penises or breasts, while others prefer smaller ones.”
For men taking Ozempic who notice changes in sexual function, healthcare providers recommend open communication with doctors, maintaining healthy lifestyle habits, and addressing any psychological concerns about body image.