What is Alka-Seltzer Heartburn + Gas? Uses, warnings & side effects

Your doctor will tell you how much to use and how often. If you are being treated for peptic ulcer, keep using this medicine for as long as your doctor tells you to.

Follow the instructions on the medicine label if you are using this medicine without a prescription.

Shake the oral liquid well before each use. Measure your dose carefully using a measuring spoon or medicine cup.

Chew the chewable tablet thoroughly before swallowing. It may be helpful to drink a glass of water after swallowing the chewed tablet.

Let the lozenge melt slowly in your mouth.

Swallow the extended-release tablet whole. Do not crush, break, or chew it.

Oral routeCarefully follow your doctor's instructions about any special diet.

If you use this medicine on a regular schedule, use the missed dose as soon as possible, unless it is almost time for your next dose.

Skip the missed dose if it is almost time for your next regular dose.

You should not use two doses at the same time.

You should not use this medicine if you have had an allergic reaction to medicines that contain calcium. Make sure your doctor knows if you have had hypercalcemia (too much calcium in your body).

You should not use certain brands of this medicine if you have kidney disease or are on dialysis, because they may harm your kidneys. Ask your caregiver what brands are best for you.

Tell your doctor if your heartburn or stomach problems do not get better after 1 or 2 weeks or if they get worse after taking this medicine.

If you are pregnant or breastfeeding, talk to your doctor before using this medicine.

Talk with your doctor before using antacids if you have kidney disease or liver disease.

Antacids may contain large amounts of salt. Talk to your doctor before using this medicine if you are on a low-sodium diet.

Antacids may keep other medicines from working the way they are supposed to. Do not use an antacid within 1 to 2 hours before or after using other medicines. If you have questions about when are the best times to use your medicines, ask your doctor or pharmacist.

If you are using an antibiotic such as tetracycline, minocycline, or doxycycline, do not take an antacid within 3 hours before or after taking the antibiotic.

Avoid drinking large amounts of milk with this medicine.

Tell your doctor if your heartburn or stomach problems do not get better after 1 or 2 weeks or if they get worse after taking this medicine.

Antacids may contain large amounts of salt. Talk to your doctor before using this medicine if you are on a low-sodium diet.