Diarrhea, nausea, stomach upset, vomiting, painful urination and rash.
Other Precautions : * Avoid excess dosage.
Drug Name : Methenamine
Methenamine(Hiprex) generic is a urinary antiseptic, prescribed for urinary tract infections. It helps in formation of formaldehyde in the urine, which kills bacteria in the urine.
More Info about Methenamine