-amphetamine
-antibiotics
-captopril
-delavirdine
-gabapentin
-heart medicines, such as digoxin or digitoxin
-hyoscyamine
-iron salts
-isoniazid
-medicines for breathing difficulties like ipratropium and tiotropium
-medicines for diabetes
-medicines for fungal infections like itraconazole and ketoconazole
-medicines for osteoporosis like alendronate, etidronate, risedronate and tiludronate
-medicines for overactive bladder like oxybutynin and tolterodine
-medicines for seizures like ethotoin and phenytoin
-methenamine
-mycophenolate
-pancrelipase
-penicillamine
-phenothiazines like chlorpromazine, mesoridazine, prochlorperazine, thioridazine
-quinidine
-rosuvastatin
-sodium fluoride
-sodium polystyrene sulfonate
-sotalol
-sucralfate
-tacrolimus
-thyroid hormones like levothyroxine
-ursodiol
-vitamin D
-zalcitabine

They need to know if you have any of these conditions:
-bowel, intestinal, or stomach disease
-constipation
-diarrhea
-kidney disease
-liver disease
-on a sodium (salt) restricted diet
-stomach bleeding or obstruction
-an unusual or allergic reaction to aluminum hydroxide, magnesium hydroxide, simethicone, other medicines, foods, dyes, or preservatives
-pregnant or trying to get pregnant
-breast-feeding

Tell your doctor or healthcare professional if your symptoms do not start to get better or if they get worse. Do not treat yourself for stomach problems with this medicine for more than 2 weeks. See a doctor if you have black tarry stools, rectal bleeding, or if you feel unusually tired. Do not change to another antacid product without advice.

If you are taking other medicines, leave an interval of at least 2 hours before or after taking this medicine.

To help reduce constipation, drink several glasses of water a day.

Keep out of the reach of children.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Do not freeze. Protect from light and moisture. Throw away any unused medicine after the expiration date.