Methenamine Sodium Phosphate Monobasic Monohydrate Phenyl Sa + Antacids Containing Calcium Interaction
Moderateinteraction on record
Description
May reduce absorption of hyoscyamine and cause urine alkalinity, reducing methenamine effectiveness. Doses should be spaced 1 hour apart.
Mechanism
Reduced hyoscyamine absorption; urine alkalinization
Source: NLP:methenamine, sodium phosphate, monobasic, anhydrous, phenyl salicylate, methylene blue and hyoscyamine sulfate