What is Flutamide? Uses, warnings & side effects

Updated May 14, 2025  •  Published Dec 30, 2020

Flutamide overview

BRAND NAMES:

Generic Names:

  • Flutamide

Uses:

  • Treats prostate cancer.

Therapeutic Classes:

  • Antiandrogen

Forms:

  • Capsule

How it’s taken:

  • By mouth

What is Flutamide used for?

Flutamide comes in capsule form and is used in combination with other hormones to treat prostate cancer. It works in the body by preventing the actions of the male hormone androgen. Common side effects include, vomiting, diarrhea and nausea.

What form(s) does Flutamide come in?

  • Capsule

What are common Flutamide dosages?

  • Capsule 125MG

Flutamide images - What does Flutamide look like?

  • Flutamide
    125mg capsule

How to take Flutamide

  • Flutamide is taken with other medicines to treat prostate cancer. Take all other medicines your doctor has prescribed as part of your combination treatment.

  • This medicine is to be used by men only.

  • Your doctor will tell you how much of this medicine to take and how often. Do not take more medicine or take it more often than your doctor tells you to.

  • This medicine is to be used by men only.

  • Your doctor will tell you how much of this medicine to take and how often. Do not take more medicine or take it more often than your doctor tells you to.

  • Flutamide is taken with other medicines to treat prostate cancer. Take all other medicines your doctor has prescribed as part of your combination treatment.

What to do if you miss a dose of Flutamide

  • Do not use extra medicine to make up for a missed dose.

  • If you miss a dose or forget to take your medicine, take it as soon as you can. If it is almost time for your next dose, wait until then to take the medicine and skip the missed dose.

Flutamide contraindications - Who shouldn't take Flutamide?

  • You should not use this medicine if you have had had an allergic reaction to flutamide, or if you have severe liver disease.

Flutamide warnings

  • Yellow skin or eyes

  • Your doctor may want to test your blood while you are taking this medicine. Make sure you keep all appointments.

  • Use a condom to keep your semen out of contact with your sexual partner, especially if she is pregnant.

  • Make sure your doctor knows if you have liver disease.

Flutamide interactions & what to avoid when taking Flutamide

  • Your doctor may want to test your blood while you are taking this medicine. Make sure you keep all appointments.

  • Use a condom to keep your semen out of contact with your sexual partner, especially if she is pregnant.

  • Make sure your doctor knows if you are taking blood thinners (Coumadin®).

Flutamide side effects - How does Flutamide make you feel?

Serious Side Effects

  • Nausea, vomiting, loss of appetite, pain in the upper stomach

  • Yellow skin or eyes

  • Problems with sex

  • Tiredness

  • Dark-colored urine or pale stools

  • Extreme weakness

Less Serious Side Effects

  • Diarrhea, stomach upset, loss of appetite

  • Breast swelling

  • Hot flashes

  • Depression

  • Problems with sex

  • Tiredness

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