Do not take this medicine with any of the following medications:
-atazanavir
-nelfinavir

This medicine may also interact with the following medications:
-ampicillin
-delavirdine
-digoxin
-diuretics
-iron salts
-itraconazole, ketoconazole, voriconazole, or other prescription medicines for fungus or yeast infections
-sucralfate
-theophylline
-warfarin

They need to know if you have any of these conditions:
-liver disease
-low levels of magnesium in the blood
-lupus
-an unusual or allergic reaction to lansoprazole, other medicines, foods, dyes, or preservatives
-pregnant or trying to get pregnant
-breast-feeding

It can take several days before your stomach pain gets better. Check with your doctor or health care professional if your condition does not start to get better, or if it gets worse.

Do not treat diarrhea with over the counter products. Contact your doctor if you have diarrhea that lasts more than 2 days or if it is severe and watery.

You may need blood work done while you are taking this medicine.

This medicine may cause a decrease in vitamin B12. You should make sure that you get enough vitamin B12 while you are taking this medicine. Discuss the foods you eat and the vitamins you take with your health care professional.

Keep out of the reach of children.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Protect from moisture. Throw away any unused medicine after the expiration date.