What are the side effects of Cartia XT (diltiazem)?

Dr. Jeanne Morrison, PhD
Family Practitioner

Cartia XT side effects range from mild to severe. Contact your doctor if you notice symptoms of an allergic reaction, such as trouble breathing or swelling in the face. Other side effects that warrant a call to the doctor include a sudden weight gain or swelling; peeling or blistering skin that accompanies a fever; headache, or sore throat; breathlessness; fainting; slow or rapid heartbeats; nausea; stomach pain; discolored urine; and yellowing of the eyes or skin. Less serious side effects include warmth; itching or a tingling feeling under the skin; nausea; dizziness; or a stuffy nose. Talk to your doctor before starting this medication to find out what to watch for, and promptly report unusual symptoms to your doctor or medical professional.

Some of the possible side effects of Cartia XT include: nausea, rashes, itching; skin redness, warmth or tingling, appetite loss, sore throat  and headaches. If you experience these side effects and they do not go away, report them to your doctor. Other more serious side effects that need medical attention, call your doctor right away if you have any of the following symptoms: exhaustion, dark-colored urine, clay-colored stool, slight fever, rapid weight gain, swelling, yellowing of the skin or eyes,  blistering or peeling of the skin, fainting spells, or unusually fast or slow heart rhythm. Call 911 if you have signs of an allergic reaction to Cartia XT. These symptoms include hives, swelling of your tongue, lips, or throat and difficulty breathing. Also this medication may be harmful to a fetus and infants. Do not take this medication if you are pregnant or think you may be pregnant. Do not breastfeed while taking this medication.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.