Methenamine and Sodium Acid Phosphate
What is it? Overview Usage Side Effects and Warnings

What is Methenamine and Sodium Acid Phosphate?

(meth EN a meen & SOW dee um AS id FOS fate)

• This medicine is used to prevent or treat a urinary tract infection.

What are the precautions when taking this medicine?

• Check medicines with healthcare provider. This medicine may not mix well with other medicines.

• Do not take aspirin, antacids or medicines that raise the pH of the urine while on this medicine.

• Avoid citrus fruits, dairy products, and certain vegetables while taking this medicine.

• Certain water pills may decrease the effects of this medicine. Talk with healthcare provider.

• Tell healthcare provider if you are pregnant or plan on getting pregnant.

• Tell healthcare provider if you are breast-feeding.

What are some possible side effects of this medicine?

• Feeling dizzy. Rise slowly over several minutes from sitting or lying position. Be careful climbing.

• Headache.

• Muscle weakness.

• Confusion.

• Nausea or...