FAMOTIDINE; CALCIUM CARBONATE; MAGNESIUM HYDROXIDE (fam moe ti deen; KAL see um KAR bon ate; mag NEE zhum hye DROX ide) treats occasional heartburn, indigestion, upset stomach, or other conditions caused by too much stomach acid. It works by reducing the amount of acid in the stomach.

How should I use this medication?

Take this medication by mouth with water. Take it as directed on the label. Chew or crush it completely before swallowing. Do not swallow tablets whole. Do not use it more often than directed. This product contains antacids. It should be taken at a different time of day than some other medications taken by mouth. Talk to your care team if you are not sure if you should separate the timing of your medications. Talk to your care team about the use of this medication in children. While it may be given to children as young as 12 years for selected conditions, precautions do apply.

Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once. NOTE: This medicine is only for you. Do not share this medicine with others.

What if I miss a dose?

This does not apply. This medication is not for regular use. It should only be used as needed.

Where should I keep my medication?

Keep out of the reach of children and pets. Store at room temperature between 20 and 25 degrees C (68 and 77 degrees F). Protect from moisture. Keep the container tightly closed. Get rid of any unused medication after the expiration date. To get rid of medications that are no longer needed or have expired: -Take the medication to a medication take-back program. Check with your pharmacy or law enforcement to find a location. -If you cannot return the medication, check the label or package insert to see if the medication should be thrown out in the garbage or flushed down the toilet. If you are not sure, ask your care team. If it is safe to put it in the trash, empty the medication out of the container. Mix the medication with cat litter, dirt, coffee grounds, or other unwanted substance. Seal the mixture in a bag or container. Put it in the trash.

NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.

What side effects may I notice from receiving this medication?

Side effects that you should report to your care team as soon as possible: -Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat Side effects that usually do not require medical attention (report these to your care team if they continue or are bothersome): -Constipation -Dizziness -Headache

This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What should I tell my care team before I take this medication?

They need to know if you have any of these conditions: -Irregular heartbeat or rhythm -Kidney disease -Liver disease -Stomach bleeding -An unusual or allergic reaction to calcium carbonate, famotidine, magnesium hydroxide, other medications, foods, dyes, or preservatives -Pregnant or trying to get pregnant -Breastfeeding

What may interact with this medication?

-Antibiotics, such as ciprofloxacin or tetracycline -Delavirdine -Gabapentin -Iron supplements -Levothyroxine -Medications for fungal infections, such as ketoconazole and itraconazole -Medications for seizures, such as phenytoin -Mycophenolate -Other antacids -Other stomach acid blockers, such as cimetidine, lansoprazole, omeprazole, pantoprazole -Rosuvastatin -Sucralfate

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

What should I watch for while using this medication?

Visit your care team for regular checks on your progress. Tell your care team if your symptoms do not start to get better or if they get worse. If you need to use this medication for more than 14 days, talk to your care team. If you get black, tarry stools or vomit up what looks like coffee grounds, call your care team right away. You may have a bleeding ulcer. You should make sure you get enough vitamin B12 while you are taking this medication. Discuss the foods you eat and the vitamins you take with your care team.