Last update: Feb. 11, 2019
Moderately safe. Probably compatible.
Mild risk possible. Follow up recommended.
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An antibacterial used in the long-term prophylaxis and treatment of recurrent lower urinary tract infections (bladder) and asymptomatic bacteriuria.
Oral administration 2 to 4 times a day.
It is excreted in breastmilk in clinically insignificant amounts and no problems have been observed in infants whose mothers were taking it (Allgen 1979).
Several expert authors consider it safe or probably safe to use this medication during breastfeeding (Lactmed 2018, Hale 2017 p 624, Briggs 2017).
Exposure can be minimized by waiting to breastfeed three hours after taking the drug (Mactal 2001).
We do not have alternatives for Methenamine.
Suggestions made at e-lactancia are done by APILAM´s pediatricians and pharmacists, and are based on updated scientific publications.
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