Pantoprazole (Protonix) is in a class of medications called proton-pump inhibitors.

Take Pantoprazole (Protonix) exactly as directed.

Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Diarrhea; headache; nausea; stomach pain; vomiting.

Seek medical attention right away if any of these SEVERE side effects occur:
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue; unusual hoarseness); chest pain; dark urine; fast or irregular heartbeat; fever, chills, or sore throat; red, swollen, blistered, or peeling skin; unusual bruising or bleeding; unusual tiredness; vision changes; yellowing of the skin or eyes.

This is not a complete list of all side effects that may occur. If you have questions or need medical advice about side effects, contact your doctor or health care provider.

Tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking.

Ampicillins
Anticoagulants
Azole antifungals
Clarithromycin
HIV protease inhibitors
Iron
Voriconazole

This may not be a complete list of all interactions that may occur. Ask your health care provider if Pantoprazole (Protonix) may interact with other medicines that you take.

If overdose is suspected, contact your local poison control center or emergency room immediately.

Before taking Pantoprazole (Protonix) tell your doctor:

if you are allergic to Pantoprazole (Protonix) or any other medications

if you are pregnant, plan to become pregnant, or are breast-feeding

if you become pregnant while taking pantoprazole, call your doctor

if you have low blood zinc levels

Do not take a double dose to make up for a missed dose.

Pantoprazole (Protonix) is used to treat ulcers, gastroesophageal reflux disease, erosive esophagitis, or Zollinger-Ellison syndrome.

Pantoprazole (Protonix) may be prescribed for other uses; ask your doctor or pharmacist for more information.

Store it at room temperature and away from excess heat and moisture.

Contact your doctor if you have any symptoms of a bleeding ulcer, such as:

black tarry stools
vomit that looks like coffee grounds
if you experience throat pain, chest pain, severe stomach pain
have trouble swallowing

Be sure your doctor and lab personnel know you are taking Pantoprazole (Protonix).

If you have any questions about Pantoprazole (Protonix), please talk with your doctor, pharmacist, or other health care provider.