Tamsulosin Pregnancy and Breastfeeding Warnings
Tamsulosin is also known as: Flomax
Tamsulosin Pregnancy Warnings
Tamsulosin has been assigned to pregnancy category B by the FDA. Animal data have failed to reveal evidence of fetotoxicity, even after doses that yielded blood levels that were approximately 50 times the human therapeutic exposure. There are no approved indications for use of this drug in females.
Animal data have revealed significantly reduced fertility in males after doses that yielded blood levels that were approximately 50 times the human exposure with the maximum therapeutic dose. The mechanism is believed to be an adverse effect on the vaginal plug formation possibly due to changes of semen content or impairment of ejaculation. The effects on fertility were reversible within three days after a single dose and four to nine weeks after multiple dosing. Multiple doses up to 16 times the human exposure did not significantly alter male fertility in animals. Human data are not available. Animal data have revealed significantly reduced fertility in females after doses that yielded blood levels that were approximately 50 times the human exposure with the maximum therapeutic dose. The mechanism is believed to be related to impairment of fertilization. Multiple doses up to 16 times the human exposure did not significantly alter female fertility in animals. Human data are not available. There are no indications for this drug in females.
Tamsulosin Breastfeeding Warnings
There are no data on the excretion of tamsulosin in human milk. There are no indications for use of this drug in females.
- Tamsulosin Consumer Information
- Pregnancy Support Group
- FDA Pregnancy Categories
- Medicine use during Pregnancy
- Medicine use while Breastfeeding
- Safe Medications during Breastfeeding
Disclaimer: Every effort has been made to ensure that the information provided by Cerner Multum, Wolters Kluwer Health and Drugs.com is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This drug information does not endorse drugs, diagnose patients, or recommend therapy. This drug information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective, or appropriate for any given patient. Multum Information Services, Inc. does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. Copyright 2000-2008 Multum Information Services, Inc. The information in contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse, or pharmacist.