Generic Name: calcium carbonate (KAL see um KAR boe nate)
Brand Name: Alcalak, Alka-Mints, Calci Mix (obsolete), Calci-Mix, Calcium Oyster Shell, Cal-Gest, Caltrate, Icar Prenatal Chewable Calcium, Maalox Quick Dissolve, Maalox Regular Strength, Os-Cal 500, Oysco 500, Oyster Calcium, Oyster Shell Calcium 500, Pepto Children's, Rolaids Soft Chew, Tums
What is Oyster Shell (calcium carbonate)?
Calcium is a mineral that is found naturally in foods. Calcium is necessary for many normal functions of the body, especially bone formation and maintenance. Calcium can also bind to other minerals (such as phosphate) and aid in their removal from the body.
Calcium carbonate is used to prevent and to treat calcium deficiencies.
Calcium carbonate may also be used for purposes not listed in this medication guide.
What is the most important information I should know about Oyster Shell (calcium carbonate)?
Calcium can make it harder for your body to absorb certain medicines. Tell your doctor about all medicines you use, and those you start or stop using during your treatment with calcium carbonate.
What should I discuss with my healthcare provider before taking Oyster Shell (calcium carbonate)?
Ask a doctor or pharmacist if it is safe for you to take this medicine if you have other medical conditions, especially:
a history of kidney stones;
a parathyroid gland disorder; or
if you are taking an antibiotic.
Do not use this medicine without a doctor's advice if you are pregnant or breast-feeding. Your dose needs may be different during pregnancy or while you are nursing.
Do not give this medicine to a child without medical advice.
How should I take Oyster Shell (calcium carbonate)?
Use exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.
Calcium carbonate works best if you take it with food.
Swallow the calcium carbonate tablet or capsule with a full glass of water.
The chewable tablet should be chewed before you swallow it.
Shake the oral suspension (liquid) well just before you measure a dose. Measure liquid medicine with the dosing syringe provided, or with a special dose-measuring spoon or medicine cup. If you do not have a dose-measuring device, ask your pharmacist for one.
Use the calcium carbonate powder as directed. Allow the powder to dissolve completely, then consume the mixture.
Store at room temperature away from moisture and heat.
What happens if I miss a dose?
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
What should I avoid while taking Oyster Shell (calcium carbonate)?
Follow your healthcare provider's instructions about any restrictions on food, beverages, or activity.
Oyster Shell (calcium carbonate) side effects
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
little or no urinating;
swelling, rapid weight gain; or
high levels of calcium in the blood--nausea, vomiting, stomach pain, loss of appetite, constipation, increased thirst or urination, muscle pain or weakness, joint pain, confusion, and feeling tired or restless.
Common side effects may include:
nausea or vomiting;
dry mouth or increased thirst; or
urinating more than usual.
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.
See also: Side effects (in more detail)
What other drugs can affect Oyster Shell (calcium carbonate)?
Other drugs may interact with calcium carbonate, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell each of your health care providers about all medicines you use now and any medicine you start or stop using.
More about Oyster Shell (calcium carbonate)
- Other brands: Caltrate, Tums Regular Strength, Maalox Regular Strength, Oyster Shell Calcium 500, More (28) »
Related treatment guides
Where can I get more information?
- Your doctor or pharmacist can provide more information about calcium carbonate.
- 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.
- Disclaimer: Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.
Copyright 1996-2012 Cerner Multum, Inc. Version: 6.01. Revision Date: 2014-02-11, 1:34:36 PM.