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Drug Information For:


Ingredient Name:

LANSOPRAZOLE (lan-SOE-pra-zole)

Drug Manufacturer:


Common Uses:

This medicine is a proton pump inhibitor (PPI) used to prevent or treat certain types of ulcers. It is also used to treat symptoms of gastroesophageal reflux disease (GERD) (eg, heartburn) and irritation of the esophagus. It is also used to treat conditions that cause your body to make too much stomach acid (eg, Zollinger-Ellison syndrome). It may also be used for other conditions as determined by your doctor.

Before Using This Medicine:

Some medicines or medical conditions may interact with this medicine. INFORM YOUR DOCTOR OR PHARMACIST of all prescription and over-the-counter medicine that you are taking. DO NOT TAKE THIS MEDICINE if you are taking an atazanavir, dasatinib, or rilpivirine. ADDITIONAL MONITORING OF YOUR DOSE OR CONDITION may be needed if you are taking ampicillin, anticoagulants (eg, warfarin), bosutinib, clopidogrel, digoxin, diuretics (eg, furosemide, hydrochlorothiazide), erlotinib, indinavir, iron, itraconazole, ketoconazole, methotrexate, mycophenolate, nelfinavir, nilotinib, posaconazole, saquinavir, sorafenib, tacrolimus, or theophylline. DO NOT START OR STOP any medicine without doctor or pharmacist approval. Inform your doctor of any other medical conditions, including liver problems; stomach or bowel cancer; osteoporosis (weak bones), a family history of osteoporosis, or other risk factors of osteoporosis (eg, smoking, poor nutrition); low blood potassium or magnesium levels; allergies; pregnancy; or breast-feeding. Contact your doctor or pharmacist if you have any questions or concerns about using this medicine.

How to Use This Medicine:

Follow the directions for taking this medicine provided by your doctor. TAKE THIS MEDICINE by mouth on an empty stomach before eating. Place 2 tablespoons (30 mL) of water in a small cup. DO NOT use other liquids or foods. Empty the contents of the packet into the cup, stir well, and drink at once. DO NOT STORE THE MIXTURE for use at a later time. IF ANY OF THE MIXTURE REMAINS IN THE CUP, refill with water, stir, and drink at once. YOU MAY TAKE ANTACIDS while you are using this medicine if you are directed to do so by your doctor. IF YOU ARE ALSO TAKING AN IMIDAZOLE ANTIFUNGAL (EG, KETOCONAZOLE), take it at least 2 hours before taking this medicine. IF YOU ALSO TAKE SUCRALFATE, take this medicine at least 30 minutes before taking sucralfate. DO NOT TAKE THIS MEDICINE THROUGH AN ENTERAL TUBE (EG, G-TUBE, NG-TUBE). If you must take your medicines through an enteral tube, discuss your dosing options with your doctor. STORE THIS MEDICINE at 77 degrees F (25 degrees C), away from heat, moisture, and light. Brief storage at temperatures between 59 and 86 degrees F (15 and 30 degrees C) is permitted. KEEP THIS MEDICINE out of the reach of children and away from pets. Continue to take this medicine even if you feel well. Do not miss any doses. IF YOU MISS A DOSE of this medicine, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.


DO NOT TAKE THIS MEDICINE if you have had an allergic reaction to it or if you are allergic to any ingredient in this product. DO NOT CHANGE YOUR DOSE, stop taking this medicine, or take this medicine for longer than prescribed without checking with your doctor. THIS MEDICINE MAY AFFECT CERTAIN LAB TEST RESULTS. Make sure laboratory personnel and your doctors know you use this medicine. BEFORE YOU HAVE ANY MEDICAL OR DENTAL TREATMENTS, EMERGENCY CARE, OR SURGERY, tell the doctor or dentist that you are taking this medicine. This medicine may cause drowsiness or dizziness. DO NOT DRIVE, OPERATE MACHINERY, OR DO ANYTHING ELSE THAT COULD BE DANGEROUS until you know how you react to this medicine. Using this medicine alone, with other medicines, or with alcohol may lessen your ability to drive or to perform other potentially dangerous tasks. THIS MEDICINE MAY INCREASE THE RISK OF A SERIOUS FORM OF DIARRHEA. Contact your doctor right away if stomach pain or cramps, severe or persistent diarrhea, or bloody or watery stools occur. Discuss any questions or concerns with your doctor. LOW BLOOD MAGNESIUM LEVELS HAVE BEEN REPORTED RARELY in patients taking PPIs for at least 3 months. In most cases, this effect was seen after a year of treatment. If you will be taking this medicine for a long time or if you take certain other medicines (eg, digoxin, diuretics such as furosemide or hydrochlorothiazide), your doctor may perform lab tests to check for low blood magnesium levels. Seek medical attention right away if you experience symptoms of low blood magnesium levels (eg, dizziness; fast or irregular heartbeat; involuntary muscle movements; jitteriness or tremors; muscle aches, cramps, pain, spasms, or weakness; seizures). BEFORE YOU BEGIN TAKING ANY NEW MEDICINE, either prescription or over-the-counter, check with your doctor or pharmacist. CONTACT YOUR DOCTOR if you have any symptoms of a bleeding ulcer, such as black, tarry stools or vomit that looks like coffee grounds; or if you experience throat pain, chest pain, severe stomach pain, or trouble swallowing. THIS MEDICINE MAY INCREASE THE RISK of hip, wrist, and spine fractures in patients with weak bones (osteoporosis). The risk may be greater if you use this medicine in high doses, for long periods of time, or if you are over 50 years old. Contact your doctor if you have any questions about this information. CHECK WITH YOUR DOCTOR to see whether you should take a calcium and vitamin D supplement while you use this medicine. CAUTION IS ADVISED WHEN USING THIS MEDICINE IN ASIAN PATIENTS because the risk of side effects may be increased. CAUTION IS ADVISED WHEN USING THIS MEDICINE IN THE ELDERLY because they may be more sensitive to its effects, especially hip, wrist, and spine fractures. PREGNANCY and BREAST-FEEDING: If you become pregnant, contact your doctor. You will need todiscuss the benefits and risks of using this medicine while you are pregnant. IT IS NOT KNOWN IF THIS MEDICINE IS FOUND in breast milk. DO NOT BREAST-FEED while taking this medicine.

Possible Side Effects:

SIDE EFFECTS that may occur while taking this medicine include constipation, headache, mild diarrhea or stomach pain, or nausea. If they continue or are bothersome, check with your doctor. CONTACT YOUR DOCTOR IMMEDIATELY if you experience bloody or watery stools; bone pain; chest, jaw, or arm pain; confusion; depression; fainting; fast, slow, or irregular heartbeat; fever, chills, or persistent sore throat; one-sided weakness; red, swollen, blistered, or peeling skin; seizures; severe or persistent diarrhea or stomach pain; severe or persistent nausea or vomiting; shortness of breath; slurred speech; stomach cramps; symptoms of liver problems (eg, dark urine, loss of appetite, pale stools, unusual nausea, yellowing of the skin or eyes); unexplained weight loss; unusual bruising or bleeding; unusual sweating; unusual tiredness or weakness; vision changes. AN ALLERGIC REACTION to this medicine is unlikely, but seek immediate medical attention if it occurs. Symptoms of an allergic reaction include rash; hives; itching; difficulty breathing; tightness in the chest or throat; swelling of the mouth, face, lips, or tongue; unusual hoarseness. This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.


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

Additional Information:

If you are taking this medicine for gastric ulcers or reflux disease, your symptoms should improve within 4 to 8 weeks. If your symptoms do not improve or if they become worse, contact your doctor. DO NOT SHARE THIS MEDICINE with others for whom it was not prescribed. DO NOT USE THIS MEDICINE for other health conditions. IF USING THIS MEDICINE FOR AN EXTENDED PERIOD OF TIME, obtain refills before your supply runs out. CHECK WITH YOUR PHARMACIST about how to dispose of unused medicine.

Copyright 2014 Wolters Kluwer Health, Inc.


- This information is not intended to substitute for professional medical advice. Be sure to contact your physician, pharmacist or other health care provider for more information about this medication. By searching these web site pages, you agree to our terms and conditions of use.