Phentermine and Breastfeeding

Since no studies have been conducted on phentermine and breastfeeding, it is not known whether the drug passes through breast milk. Phentermine is chemically similar to amphetamines (which are known to pass through breast milk and have negative effects on nursing infants), so it may not be safe for breastfeeding women. Be sure to consult your healthcare provider about phentermine and breastfeeding in your situation.

 

An Overview of Phentermine and Breastfeeding

At this time, it is not known whether phentermine passes through breast milk. Usually, healthcare providers recommend that women avoid taking phentermine while breastfeeding. If you are breastfeeding or planning to start, you should talk with your healthcare provider before taking phentermine.
 

Phentermine and Breastfeeding: What Does the Research Say?

Phentermine has not been studied in any breastfeeding women, and it is not known if phentermine passes through breast milk. However, phentermine is chemically similar to amphetamines, which are known to pass through breast milk (and to have negative effects on breastfed infants).
 
It is important to remember that breastfeeding is usually a time of increased caloric need for mothers, not a time to be dieting. It is important to eat an adequate and well-balanced diet while breastfeeding.
 

Talking With Your Healthcare Provider About Phentermine and Breastfeeding

You should talk with your healthcare provider about phentermine and breastfeeding. Each woman's situation is different, and you and your healthcare provider understand your situation best. After considering what you want and expect, as well as your current health situation, you and your healthcare provider can make a shared decision about phentermine and breastfeeding in your particular situation.
 
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Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;