Affiliations
Also part of the UPMC family:
Also part of the UPMC family:

Diltiazem (Generic Name)Other Names: Cardizem CD®, Cardizem SR®, Dilacor XR®, Tiazac®


UPMC Content 2

Dosage forms

Oral tablets:

Cardizem®: 30 mg, 60 mg, 90 mg, 120 mg

Oral capsules:

Cardizem CD®: 120 mg, 180 mg, 240 mg, 300 mg

Cardizem SR®: 60 mg, 90 mg, 120 mg

Dilacor XR®: 180 mg, 240 mg

Tiazac®: 120 mg, 180 mg, 240 mg, 300 mg, 360 mg

About this drug

Diltiazem (dil-TYE-a-zem) is used to treat high blood pressure. This medicine also is used to treat irregular heart beats and chest pain (angina). It is a calcium channel blocker.

Side effects

Common side effects are:

  • Dizziness
  • Rapid heart beats (palpitations)
  • Headache
  • Weakness
  • Nausea
  • Increased fluid in the ankles and legs

Rare side effects include:

  • Decreased heart rate
  • Flushing of the skin
  • Shortness of breath
  • Constipation

If any of these side effects become severe or bother you, call your doctor. Do not take over-the-counter medicines for your symptoms.

Drug interactions

Tell your doctor or pharmacist about any prescription medicine, over-the-counter medicine, or herbal products that you are taking. He or she will check for interactions.

If you miss a dose

If you miss a medicine dose, take it as soon as you remember. If it’s almost time for your next dose, skip the missed dose. Take your next dose at its scheduled time, and continue your usual dosing schedule. Do not “double up” on doses to catch up.

Don’t stop taking this medicine

Do not stop taking this medicine unless your doctor tells you to.

How to take this medicine

Take this medicine exactly as it is prescribed. The long-acting versions of this medicine(Cardizem CD®, Cardizem SR®, and Dilacor XR®) should be taken in the morning on an empty stomach. Do not chew or crush the capsules.

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