What side effects can Protonix cause?
Protonix may cause serious injury or death to an unborn or nursing baby if the mother takes Protonix while pregnant or nursing. Protonix should only be used if it is clearly needed. Allergic reactions and dangerous drug interactions can occur when taking Protonix. Make sure to tell your doctor about any allergies you have, especially if you are allergic to penicillin, and about any other medication you are taking.