Cardizem CD (Diltiazem Hcl)

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Cardizem CD Brand
Dosage Quantity & Price
Diltiazem Hcl (Generic alternate to Cardizem CD) Generic
Dosage Quantity & Price
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Table of contents:

Cardizem CD is a medication used to treat high blood pressure (hypertension) and to prevent chest pain (angina). It contains the active ingredient diltiazem hydrochloride, which is a calcium channel blocker that works by affecting the movement of calcium into the cells of the heart and blood vessels, relaxing the blood vessels, and lowering blood pressure.

Diltiazem comes in the form of capsules and the dosage may vary depending on the individual's condition and response to treatment. By lowering high blood pressure, Cardizem capsule helps to prevent strokes, heart attacks, and kidney problems. When used regularly, diltiazem can decrease the number and severity of episodes of chest pain from angina. It may help increase your ability to exercise.

Uses and Dosage

Cardizem CD comes as 24H ER Capsule and it should be taken by mouth with or without food, usually once daily or as directed by your doctor. Swallow the capsules whole and not crush or chew them, as doing so can release all the drugs at once and may increase your risk of side effects. Use the Capsule regularly to get the most benefit from it and take it at the same time each day to help you remember. Most people with high blood pressure do not feel sick, and it may take 2 to 4 weeks before you get the full benefit of this drug.

The dosage range for Cardizem CD is 180 to 360 mg/day, taken once daily or in 3 or 4 divided doses. The usual starting dose is 180 to 240 mg once a day in the morning, and the dosage may be increased by a healthcare provider based on an individual's medical condition and response to treatment. The maximum dose for Cardizem CD is 480 mg/day, but doses exceeding 360 mg/day are not recommended.

Side effect

Common Side Effects of Cardizem CD (Diltiazem CD):

  • Constipation
  • Dizziness
  • Flushing
  • Headache
  • Lightheadedness
  • Nausea
  • Stomach upset
  • Weakness

Serious Side Effects of Cardizem CD (Diltiazem CD):

  • Dark urine
  • Fainting
  • Irregular heartbeat
  • Mental or mood changes
  • Persistent vomiting
  • Severe abdominal pain
  • Signs of worsening heart failure (shortness of breath, swelling of lower extremities, unusual fatigue, sudden weight gain)
  • Unusual dreams
  • Yellowish skin

Form and Strength

Cardizem CD (Diltiazem CD) is available in the following forms and strengths:

Cardizem CD: 24H ER Capsule

  • 120 mg
  • 180 mg
  • 240 mg
  • 300 mg
  • 360 mg

Diltiazem CD: 24H ER Capsule

  • 120 mg
  • 180 mg
  • 240 mg
  • 300 mg


  • Avoid driving and doing other tasks or actions that call for you to be alert until you see how Cardizem CD (diltiazem long-acting capsules) affects you.
  • Check blood pressure and heart rate as the doctor has told you.
  • If you are 65 or older, use Cardizem CD (diltiazem long-acting capsules) with care. You could have more side effects.
  • If you are taking Cardizem CD (diltiazem long-acting capsules) and have high blood pressure, talk with your doctor before using OTC products that may raise blood pressure. These include cough or cold drugs, diet pills, stimulants, ibuprofen or like products, and some natural products or aids.
  • If you drink grapefruit juice or eat grapefruit often, talk with your doctor.
  • Tell all your healthcare providers that you take Cardizem CD (diltiazem long-acting capsules). This includes your doctors, nurses, pharmacists, and dentists.
  • Tell your doctor if you are pregnant, plan to get pregnant, or are breastfeeding. You will need to talk about the benefits and risks to you and the baby.
  • To lower the chance of feeling dizzy or passing out, rise slowly if you have been sitting or lying down. Be careful going up and down stairs.
  • You may need to avoid drinking alcohol with some products. Talk with your doctor or pharmacist to see if you need to avoid drinking alcohol with Cardizem CD (diltiazem long-acting capsules).
  • You may need to have an ECG checked before starting Cardizem CD (diltiazem long-acting capsules) and while taking it. Talk to your doctor.

Frequently Asked Questions (FAQ)

Can Cardizem CD be used during pregnancy or while breastfeeding?

Do not use Cardizem CD during pregnancy or while breastfeeding, as it may harm the developing fetus or infant. Discuss any potential risks with a healthcare provider and to use effective birth control during treatment with Cardizem CD.

What should I do if I miss a dose of Cardizem CD?

If you miss a dose of Cardizem CD, take it as soon as you remember. However, if it is close to the time for your next dose, skip the missed dose and resume your regular dosing schedule. Do not double the dose to catch up.

Can Cardizem CD cause interactions with alcohol?

Yes, Cardizem CD may interact with alcohol and cause an increased risk of drowsiness or dizziness. It is recommended to avoid drinking alcohol while taking Cardizem CD.

Can I stop taking Cardizem CD without consulting a doctor?

No, continue taking Cardizem CD as prescribed by a healthcare provider. Stopping the medication abruptly may cause an increase in blood pressure or chest pain. If you wish to stop taking Cardizem CD, discuss this with a healthcare provider first.


It's important to purchase Cardizem CD from verified Canadian pharmacy.

Additional information

Generic name:

Diltiazem CD, Diltiazem Cd, Diltiazem HCL, Diltiazem Hcl


24H ER Capsule, Capsule, Prolonged Release Capsule, Prolonged Release Capsules, Prolonger Release Capsule


120mg, 180mg, 240mg, 300mg, 360mg

Quantities Available:

28, 30, 60, 84, 90, 100, 180