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(Generic versions may still be available.)
- Clinician Information:
Teslac Patient Information Including Side Effects
Brand Names: Teslac
Generic Name: testolactone (Pronunciation: test O lack tone)
- What is testolactone (Teslac)?
- What are the possible side effects of testolactone (Teslac)?
- What is the most important information I should know about testolactone (Teslac)?
- What should I discuss with my healthcare provider before taking testolactone (Teslac)?
- How should I take testolactone (Teslac)?
- What happens if I miss a dose (Teslac)?
- What happens if I overdose (Teslac)?
- What should I avoid while taking testolactone (Teslac)?
- What other drugs will affect testolactone (Teslac)?
- Where can I get more information?
What is testolactone (Teslac)?
Testolactone blocks the production of the hormone estrogen. Certain types of breast cancer require estrogen to grow.
Testolactone is used to treat some types of breast cancer.
Testolactone may also be used for purposes other than those listed in this medication guide.
What are the possible side effects of testolactone (Teslac)?
Stop taking testolactone and seek emergency medical attention or contact your doctor immediately if you experience any of the following serious side effects:
- an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives);
- new breast lumps;
- bone pain;
- menstrual changes, abnormal vaginal bleeding, vaginal discharge, or pelvic pain or pressure; or
- excessive nausea, vomiting, or thirst.
Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.
Read the Teslac (testolactone) Side Effects Center for a complete guide to possible side effects
What is the most important information I should know about testolactone (Teslac)?
Testolactone should not be used for the treatment of men with breast cancer or in patients with a history of allergic reactions to the drug.
Additional Teslac Information
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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