What is the purpose of receiving prostate cancer injections every 3 months?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Prostate cancer injections given every 3 months are a form of hormone therapy that helps control cancer growth by lowering testosterone levels. Since prostate cancer cells rely on testosterone to grow, reducing this hormone can slow the disease's progression, shrink tumors, and ease symptoms. These injections are commonly used for advanced or recurrent prostate cancer and may be combined with other treatments for better outcomes.

If you're experiencing symptoms or concerns that could point to prostate issues, don't wait to gain clarity. Taking a free, instant, online symptom check can help you better understand what's happening in your body, identify possible causes, and guide your next steps—whether that means speaking with a doctor sooner or simply feeling more informed. Early awareness matters, and it only takes a few minutes.

Reviewed for medical accuracy: 07/14/2026

Important Next Steps

Learn if prostate cancer injections fit your symptoms Discover likely causes of your prostate-related symptoms See whether your symptoms need urgent care Find OTC options for prostate cancer symptoms Find a doctor for prostate cancer care Learn medically valid home remedies for prostate cancer Find out if it could be serious

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Explanation

Prostate cancer injections are given every 3 months to help manage the disease by lowering testosterone levels in the body. Testosterone is a hormone that can make prostate cancer grow faster, so reducing its levels can help control the cancer.

How it Works:

These injections use medications like leuprorelin or goserelin, which are known as hormone therapy drugs.
They work by stopping the body from making testosterone or blocking its effects.

Benefits of 3-Month Injections:

"Depot" formulations mean the medication is released slowly over time, so you only need an injection every 3 months.
This can be more convenient than taking daily pills or more frequent injections.

Studies:

According to research, these injections have been shown to be effective in controlling prostate cancer by keeping testosterone levels low for extended periods.
They are a common treatment option for advanced prostate cancer.

These injections are an important part of prostate cancer treatment and can help improve quality of life by slowing the progression of the disease. If you're experiencing any concerning symptoms or want to better understand your health, try our free symptom checker to get personalized insights.

(References)

Jocham D. (1998). .... three-month depot in the treatment .... Urologia internationalis, 9607554.
Shore ND, Guerrero S, Sanahuja RM, Gambús G, & Parente A. (2019). A New Sustained-release, 3-Month .... Clinical therapeutics, 30929678.
Fontana D, Mari M, Martinelli A, Boccafoschi C, Magno C, Turriziani M, et al. (2003). 3-month formulation of .... Urologia internationalis, 12740498.

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