Skip to Content

Clonazepam Pregnancy and Breastfeeding Warnings

Clonazepam is also known as: Klonopin, Klonopin Wafer

Clonazepam Pregnancy Warnings

Clonazepam has been assigned to pregnancy category D by the FDA. An increased risk of congenital malformations in humans has been associated with use of all known anticonvulsant agents in the treatment of women with epilepsy. However, epilepsy itself may be associated with an increased risk of congenital malformations. Additionally, use of other benzodiazepines is associated with an increased risk in congenital malformations. Only very limited experience with the use of clonazepam during pregnancy has been reported. Some reports have suggested that clonazepam may possess less teratogenic potential than other anticonvulsants and benzodiazepines, however, there are no controlled data in human pregnancy. One report has indicated that clonazepam may cause neonatal apnea. Clonazepam should only be given during pregnancy when there are no alternatives and benefit outweighs risk.

To provide information regarding the effects of in utero exposure to clonazepam, physicians are advised to recommend that pregnant patients taking clonazepam enroll in the North American Antiepileptic Drug (NAAED) Pregnancy Registry. This can be done by calling the toll free number 1-888-233-2334, and must be done by patients themselves. Information on the registry can also be found at the website

Clonazepam Breastfeeding Warnings

Clonazepam is excreted into human milk in small amounts. No adverse effects have been reported in nursing infants, but experience is quite limited. The American Academy of Pediatrics has no position on the use of clonazepam during breast-feeding but describes other benzodiazepines as drugs "whose effect on nursing infants is unknown but may be of concern".

See Also...

Disclaimer: Every effort has been made to ensure that the information provided by Cerner Multum, Wolters Kluwer Health and 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 material 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 combination thereof in no way should be construed to indicate that the drug or 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 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.