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There have been postmarketing reports of hospitalization and rarely death due to liver failure in patients taking flutamide. Evidence of hepatic injury included elevated serum transaminase levels, jaundice, hepatic encephalopathy, and death related to acute hepatic failure. The hepatic injury was reversible after discontinuation of therapy in some patients. Approximately half of the reported cases occurred within the initial 3 months of treatment with flutamide.
Serum transaminase levels should be measured prior to starting treatment with flutamide. Flutamide is not recommended in patients whose ALT values exceed twice the upper limit of normal. Serum transaminase levels should then be measured monthly for the first 4 months of therapy, and periodically thereafter. Liver function tests also should be obtained at the first signs and symptoms suggestive of liver dysfunction, eg, nausea, vomiting, abdominal pain, fatigue, anorexia, "flu-like" symptoms, hyperbilirubinuria, jaundice, or right upper quadrant tenderness. If at any time a patient has jaundice, or their ALT rises above 2 times the upper limit of normal, flutamide should be immediately discontinued with close follow-up of liver function tests until resolution.
EULEXIN Capsules contain flutamide, an acetanilid, nonsteroidal, orally active anti-androgen having the chemical name, 2-methyl-N-[4-nitro-3 (trifluoromethyl) phenyl] propanamide.
Each capsule contains 125 mg flutamide. The compound is a buff to yellow powder with a molecular weight of 276.2 and the following structual formula:
The inactive ingredients for EULEXIN (flutamide) Capsules include: corn starch, lactose, magnesium stearate, povidone, and sodium lauryl sulfate. Gelatin capsule shells may contain methylparaben, propylparaben, butylparaben, and the following dye systems: FD&C Blue 1, FD&C Yellow 6, and either FD&C Red 3 or FD&C Red 40 plus D&C Yellow 10, with titanium dioxide and other inactive ingredients.
What are the possible side effects of flutamide (Eulexin)?
Stop taking flutamide and seek emergency medical attention if you experience an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives).
In rare cases, flutamide has caused severe liver damage resulting in death or hospitalization. Notify your doctor immediately if you develop nausea, vomiting, abdominal pain, unusual fatigue, loss of appetite, "flu-like" symptoms, yellow skin or eyes, itching, clay-colored stools, or dark urine. These symptoms may be early signs of liver damage.
Other, less serious side effects may be more...
What are the precautions when taking flutamide (Eulexin)?
Before taking flutamide, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: liver problems, a certain enzyme deficiency (glucose-6-phosphate dehydrogenase-G6PD), smoking, hemoglobin M disease.
This drug may rarely make you dizzy or drowsy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Avoid alcoholic beverages.
Before having surgery, tell your doctor or dentist about all the products you use (including...
Last reviewed on RxList: 12/28/2004
This monograph has been modified to include the generic and brand name in many instances.
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