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Calcium Carbonate/Magnesium Hydroxide

Calcium Carbonate/Magnesium Hydroxide Dosage

Allison Gourley, PharmDKristianne Hannemann, PharmD
Reviewed by Allison Gourley, PharmD, Kristianne Hannemann, PharmD
Last reviewed on March 24, 2023

Typical dosage for Calcium Carbonate/Magnesium Hydroxide

Make sure you check the instructions of the product that you're using since this medication comes in different strengths and might have different age recommendations, directions, or maximum recommended doses. Ask your pharmacist for help with this.

Some examples include:

Rolaids (calcium carbonate / magnesium hydroxide)

  • Adults: Each tablet contains 675 mg of calcium carbonate and 135 mg of magnesium hydroxide. Chew 2 to 4 tablets by mouth when you have stomach symptoms, or as directed by your provider. The maximum recommended dose is 10 tablets in 24 hours. Don't take the maximum dosage for more than 2 weeks.

Cidatrine-TM (calcium carbonate / magnesium carbonate)

  • Adults and children (age 12 years and older): Each tablet contains 975 mg of calcium carbonate and 232 mg of magnesium carbonate. Take 3 to 4 tablets by mouth when you have stomach symptoms, or as directed by your provider. The maximum recommended dose is 8 tablets in 24 hours. Don't take the maximum dosage for more than 2 weeks.

As a general rule of thumb, you want to take the fewest amount of pieces as possible.

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