Body
August 2, 2024

Bocox (Botox for Erectile Dysfunction): What the Evidence Says

Bocox is a clinic name for injecting botulinum toxin (Botox) into the penis to treat erectile dysfunction. Early studies are encouraging for men who have not responded to standard treatment: in one randomized trial about 40% responded. But the research is small, and the reviews that have pooled it say more trials are needed before it can be considered an established treatment.

This guide explains what Bocox is, what the studies found, the side effects reported, and where it sits next to standard care.

What is Bocox?

Botulinum toxin is best known for relaxing facial muscles to soften wrinkles. In Bocox it is injected into the erectile tissue. A 2025 systematic review describes the idea: the toxin blocks nerve signals that keep the smooth muscle of the penis contracted, which may relax that muscle and improve blood flow.

It has been studied for erectile dysfunction (ED). Claims that it increases size or sensitivity are not what the trials measured.

What the studies found

A randomized trial. A 2021 trial in Andrology assigned 176 men to 100 units of Botox, 50 units, or a saline placebo. All had ED that had not responded to tablets or to injection therapy. Erection scores improved in both Botox groups and not in the placebo group, with the greatest improvement at three months. Around 40% of the men responded and were able to have intercourse. At six months the 100-unit group was doing better than the 50-unit group.

A pooled analysis. A 2025 systematic review and meta-analysis in Sexual Medicine found only two randomized trials and four retrospective studies. Combining the two trials, Botox improved a standard erection score by about four points more than saline at 12 weeks. The author concluded that there is “a lack of clinical randomized or observational studies on this topic” and that more randomized studies are required.

A wider review. A second 2025 systematic review reported response rates from 40% to 77.5% across studies, and described the overall evidence as limited by small samples and large differences between studies. It called for large placebo-controlled trials.

Who the research applies to

The men studied had ED that standard treatment had not fixed. The research does not show that Bocox is better than, or a substitute for, those treatments in men who have not tried them.

The American Urological Association says men with ED should be told about the established options: oral medicines called PDE5 inhibitors, vacuum devices, alprostadil, penile injections and implant surgery. It also says ED can be a marker of cardiovascular disease, so an assessment matters whatever treatment you choose. See causes of erectile dysfunction.

Side effects reported

The reviews found no serious body-wide side effects. The most common problem was mild, short-lived pain in the penis, in about 1.5% to 6% of men. One case of priapism, an erection that does not go down, was reported.

Follow-up in these studies was months, not years, so long-term safety is not established.

How long does Bocox last?

In the randomized trial, improvement peaked at three months and was still present at six months, particularly at the higher dose. One review says the effect may last up to six months after a single injection. Repeat treatment would be needed to maintain it.

Questions to ask first

Have the causes of my ED been assessed, including heart and hormone checks?
Which established treatments have I tried, and at what doses?
What dose would you use, and what is that based on?
What should I do if I have a prolonged erection or pain afterwards?
How will we judge whether it has worked?

Frequently asked questions

Does Bocox work?

Early trials show a benefit in some men whose ED did not respond to standard treatment. The evidence is limited, and reviewers say more trials are needed.

Is it the same as the P-Shot?

No. The P-Shot uses platelet-rich plasma. See what the evidence says about the P-Shot.

Can it be done on its own?

The trials studied it as a single treatment in men who had already tried standard therapy. Whether it adds anything when combined with other procedures has not been established.