Diltiazem HCl (Generic) Tablets, slide 1 of 1

Diltiazem HCl (Generic) Tablets

Prescription Item

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Strength: 30-mg
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Count: 1 tablet

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Diltiazem HCI is prescribed to treat and sometimes prevent certain kinds of abnormal heartbeats. Some of these include an irregular and often rapid heart rate (atrial fibrillation), a rapid heartbeat in the upper chambers (atrial flutter) and a faster than normal heart rate starting above the heart's two lower chambers (supraventricular tachycardia). Diltiazem HCI is also used in the management of heart muscle disease. Customers may receive this drug under the names Cardizem, Dilacor.


Diltiazem is primarily used for the treatment of cardiac arrhythmias. It is also used in the management of heart muscle disease.

Possible Side Effects

The most commonly reported side effect is vomiting. Other side effects include low blood pressure, lethargy, slow heart rate and heart arrhythmias.

Drug & Food Interactions

Anesthetics: The depression of cardiac contractility, conductivity, and automaticity, as well as the vascular dilation associated with anesthetics, may be potentiated by calcium channel blockers. When used concomitantly, anesthetics and calcium blockers should be titrated carefully. Talk to your vet about any other drugs the pet is taking before starting this medication.


Diltiazem is broadly absorbed by the liver and expelled by the kidneys and in bile. As with any drug that is given over extended periods, kidney and liver function should be tested at regular intervals. The drug should be used with caution in those with impaired kidney and liver function.

This drug is FDA-approved for human use. However, it is common practice for veterinarians to prescribe such drugs for use in dogs and cats.

NOTE: For Generic Medications, picture displayed may not depict actual product. Generic medications may vary from one order to the next by size, color and shape depending on manufacturer. Customers may receive the same drug under the names Cardizem, Dilacor.

  1. Prescribing Information

See all items by Diltiazem

  • Item Number
  • Common Brand Name(s)
    Cardizem, Dilacor
  • For Use With
    Dogs & Cats
  • Generic Name
    Diltiazem Hydrochloride
  • Administration Form
  • Product Form
  • Health Condition
    High Blood Pressure, Irregular Heartbeat
  • Drug Type
    Arterial Dilator


Recommended Dosage

Use only as directed. Do not stop administering this medication or change dosage without explicit instructions from a professional.

Storage Instructions

Store at temperatures between 68° - 77°F. Avoid excessive humidity.


What is Diltiazem HCI Tablets?

Diltiazem is used in the treatment of hypertrophic cardiomyopathy for cats and dogs.

What are the benefits of Diltiazem HCI Tablets?

  • Used to treat hypertrophic cardiomyopathy.
  • Easy to administer capsule.

How is this medication given?

Administer tablet orally with or without food. Follow instructions as directed by your veterinarian and the instructions on the prescription label.

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