The Basics
What is Methenamine Mandelate?
Used to prevent or control returning urinary tract infections.
Brand names for Methenamine Mandelate
Hiprex, Mandelamine, Urex, Urasal
How Methenamine Mandelate is classified
Anti-Infective Agents – Urinary, Antibacterial Agents
Methenamine Mandelate During Pregnancy
Methenamine Mandelate pregnancy category
Category CNote that the FDA has deprecated the use of pregnancy categories, so for some medications, this information isn’t available. We still think it’s useful to list historical info, however, given what a common proxy this has been in the past.
What we know about taking Methenamine Mandelate while pregnant
N/A
Taking Methenamine Mandelate While Breastfeeding
What are recommendations for lactation if you're taking Methenamine Mandelate?
Both methenamine and mandelic acid pass into milk in small quantities. Methenamine mandelate appears acceptable to use, even while nursing a newborn.
Maternal / infant drug levels
Both methenamine and mandelic acid pass into milk in small quantities. Methenamine mandelate appears acceptable to use, even while nursing a newborn.
Possible effects of Methenamine Mandelate on milk supply
Relevant published information was not found as of the revision date.
Possible alternatives to Methenamine Mandelate
Methenamine Hippurate.
List of References
Lactation sources: Drugs and Lactation Database (LactMed) [Internet]. Bethesda (MD): National Library of Medicine (US); 2006-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK501922/1. Allgen LG, Holmberg G, Persson B et al. Biological fate of methenamine in man. Acta Obstet Gynecol Scand. 1979;58:287-93. PMID: 484222
2. Berger H. Excretion of mandelic acid in breast milk. Am J Dis Child. 1941;61:256-61.
Disclaimer: This material is provided for educational purposes only and is not intended for medical advice, diagnosis, or treatment. Consult your healthcare provider with any questions.
