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Dual Action Complete

Generic Name: famotidine, calcium, and magnesium (fam OH ti deen, KAL see um, mag NEE see um)
Brand Name: Dual Action Complete, Pepcid Complete

Medically reviewed by Drugs.com on Dec 15, 2017 – Written by Cerner Multum

What is Dual Action Complete?

Famotidine is in a group of drugs called histamine-2 blockers. Famotidine works by decreasing the amount of acid the stomach produces.

Calcium and magnesium are naturally occurring minerals that neutralize acid in the stomach.

The combination of famotidine, calcium, and magnesium is used to relieve heartburn associated with acid indigestion and sour stomach.

Dual Action Complete may also be used for conditions other than those listed in this medication guide.

Important Information

Heartburn can be confused with early symptoms of heart attack. Seek emergency medical attention if you have chest pain or heavy feeling, dizziness, pain spreading to the arm or shoulder, sweating, nausea or vomiting, and a general ill feeling.

You should not use this medication if you have trouble swallowing, vomiting with blood, bloody or tarry stools, or if you are allergic to famotidine or similar medications such as ranitidine (Zantac), cimetidine (Tagamet), or nizatidine (Axid).

Ask a doctor or pharmacist about using Dual Action Complete if you have nausea, vomiting, stomach pain, unusual weight loss, wheezing or trouble breathing when you have heartburn, or if you have had heartburn for longer than 3 months.

Do not use more than two tablets in 24 hours.

Stop using Dual Action Complete if stomach pain continues or if you need to take this product for more than 14 days. You may have a more serious stomach condition that requires different treatment.

Before taking this medicine

Heartburn can be confused with early symptoms of heart attack. Seek emergency medical attention if you have chest pain or heavy feeling, dizziness, pain spreading to the arm or shoulder, sweating, nausea or vomiting, and a general ill feeling.

You should not use this medication if you have:

  • trouble swallowing;

  • vomiting with blood;

  • black, bloody, or tarry stools;

  • if you are allergic to famotidine or similar medications such as ranitidine (Zantac), cimetidine (Tagamet), or nizatidine (Axid).

Ask a doctor or pharmacist about using Dual Action Complete if you have:

  • nausea, vomiting, or stomach pain;

  • unusual weight loss;

  • wheezing or trouble breathing when you have heartburn; or

  • if you have had heartburn for longer than 3 months.

If you have any of these conditions, you may not be able to used Dual Action Complete, or you need a dose adjustment or special tests during treatment.

It is not known whether Dual Action Complete is harmful to an unborn baby. Before taking this medication, tell your doctor if you are pregnant or plan to become pregnant during treatment.

Famotidine, calcium, and magnesium may pass into breast milk and could harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.

Do not use this medication to treat a child younger than 12 years of age.

How should I take Dual Action Complete?

Use this medication exactly as directed on the label, or as prescribed by your doctor. Do not use it in larger amounts or for longer than recommended. Follow your doctor's instructions.

The chewable tablet must be chewed thoroughly before swallowing.

The usual dose of famotidine, calcium, and magnesium is one tablet as needed, up to twice per day.

Do not use more than two tablets in 24 hours.

Stop using Dual Action Complete if stomach pain continues or if you need to take this product for more than 14 days. You may have a more serious stomach condition that requires different treatment.

In addition to taking this medication, other tips for managing heartburn include:

  • Do not lie flat or bend over soon after eating.

  • Do not eat late at night, or just before bedtime.

  • Eat slowly and do not eat big meals.

  • If you smoke, quit smoking.

  • If you are overweight, lose weight.

  • Raise the read of your bed.

  • Wear loose fitting clothing around your stomach.

Certain foods or drinks are more likely to cause heartburn, such as chocolate, caffeine, alcohol, some fruits and vegetables, and rich, spicy, fatty, or fried foods.

Store Dual Action Complete at room temperature away from moisture and heat.

What happens if I miss a dose?

Take the missed dose as soon as you remember. If it is almost time for your next dose, wait until then to take the medicine and skip the missed dose. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention if you think you have used too much of Dual Action Complete.

Overdose symptoms may include nausea, vomiting, diarrhea, stomach pain, fast heart rate, or fainting.

What should I avoid while taking Dual Action Complete?

Do not take Dual Action Complete together with regular famotidine (Pepcid, Pepcid AC, Pepcid RPD) or another acid reducer; or

Dual Action Complete side effects

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop taking this medication and call your doctor at once if:

  • your heartburn gets worse; or

  • you still have heartburn after 2 weeks of taking Dual Action Complete.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What other drugs will affect Dual Action Complete?

Tell your doctor about all other medications you use. Dual Action Complete can make it harder for your body to absorb certain drugs. Your other medications may not work as well if you take them with this medicine.

There may be other drugs that can interact with Dual Action Complete. Tell your doctor about all your prescription and over-the-counter medications, vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start a new medication without telling your doctor.

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

More about Dual Action Complete (calcium carbonate / famotidine / magnesium hydroxide)

Consumer resources

Other brands: Pepcid Complete

Professional resources

Related treatment guides

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