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What Is Firmagon?

Firmagon is the brand name for degarelix, a prescription medicine for advanced prostate cancer. It lowers testosterone by blocking gonadotropin-releasing hormone receptors. Since testosterone can support prostate cancer growth, lowering it helps control the disease.

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What Is Firmagon?

Firmagon is the brand name for degarelix, a prescription medicine for advanced prostate cancer. It lowers testosterone by blocking gonadotropin-releasing hormone receptors. Since testosterone can support prostate cancer growth, lowering it helps control the disease.

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What Is Firmagon Used For?

Firmagon treats patients with advanced prostate cancer. It is a form of androgen deprivation therapy. The cancer care team monitors treatment using symptoms, testosterone levels, and other tests.

How Does Firmagon Work?

Firmagon blocks signals from the pituitary gland that tell the testes to make testosterone. Testosterone levels then fall. Reducing this hormone limits a source of stimulation for prostate cancer cells.

How Is Firmagon Given?

A healthcare professional injects Firmagon under the skin of the abdomen. Treatment begins with a starting dose followed by maintenance injections about once a month. The care team checks the injection area and monitors the response to treatment.

What Are the Side Effects and Precautions?

Pain or swelling at the injection site and hot flashes are common. Liver test results can change during treatment. Androgen deprivation therapy can also affect heart rhythm in susceptible patients, so the clinician reviews relevant heart conditions and medicines.

Frequently Asked Questions About Firmagon

Is Firmagon chemotherapy?

No. It is hormonal treatment that lowers testosterone. It works differently from chemotherapy medicines.

How is Firmagon administered?

A healthcare professional injects it under the skin of the abdomen. Maintenance treatment is given about once a month.

Does Firmagon cure advanced prostate cancer?

It is used to control the disease by lowering testosterone. The cancer care team evaluates the response and determines whether other treatment is needed.

Can Firmagon cause hot flashes?

Yes. Hot flashes are a common effect of lowered testosterone. Tell the care team if they disrupt daily life.

References

Degarelix (subcutaneous route) - Side effects & uses. Mayo Clinic. https://www.mayoclinic.org/drugs-supplements/degarelix-subcutaneous-route/description/drg-20072529. Date Accessed October 6, 2026.

Degarelix Injection. MedlinePlus. https://www.medlineplus.gov/druginfo/meds/a609022.html. Date Accessed October 6, 2026.

Degarelix injection. Cleveland Clinic. https://my.clevelandclinic.org/health/drugs/20958-degarelix-injection. Date Accessed October 6, 2026.

Hormone therapy for prostate cancer. MedlinePlus. https://www.medlineplus.gov/ency/patientinstructions/000908.htm. Date Accessed October 6, 2026.

Hormone therapy for prostate cancer. Mayo Clinic. https://www.mayoclinic.org/tests-procedures/hormone-therapy-for-prostate-cancer/about/pac-20384737. Date Accessed October 6, 2026.