• Basic Info
• Top Questions
• Clinical Info
• Interactions

Before taking nitrofurantoin, tell your doctor if you are taking:

• magnesium salicylate (Doan's Pills, Mobidin, Momentum);

• choline magnesium salicylate (Tricosal, Trilisate);

• probenecid (Benemid); or

• sulfinpyrazone (Anturane).

This list is not complete and there may be other drugs that can interact with nitrofurantoin. Tell your doctor about all your prescription and over-the-counter medications, vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start a new medication without telling your doctor.

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have any of these serious side effects:

• shortness of breath, running out of breath easily;

• fever, chills, cough, chest pain;

• jaundice (yellowing of the skin or eyes);

• pale skin, easy bruising, unusual weakness;

• numbness or tingling; or

• diarrhea that is watery or bloody.

Less serious side effects may include:

• rust-colored or brownish urine;

• headache;

• nausea, vomiting, upset stomach;

• bloating or gas, constipation;

• feeling dizzy or drowsy;

• blurred vision; or

• vaginal itching or discharge.

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect.