Cardizem is a brand name for the medication diltiazem. It is a prescription drug that belongs to a class of medications known as calcium channel blockers. Cardizem is primarily used to treat high blood pressure (hypertension) and certain heart rhythm disorders.

Drug Name: Cardizem

Active Ingredient: Diltiazem

Cardizem tablets



Form: Tablet

Type: Generic

Prescription Required: Rx

Availability: In Stock

Diltiazem works by relaxing and widening the blood vessels, allowing blood to flow more easily and reducing the workload on the heart. This helps to lower blood pressure and improve blood flow to the heart, relieving symptoms associated with various cardiovascular conditions.

Cardizem may be prescribed to manage conditions such as hypertension, angina (chest pain caused by reduced blood flow to the heart), and certain types of abnormal heart rhythms, including atrial fibrillation and atrial flutter.

How to use

Here are some general guidelines on how to use Cardizem:

  1. Take as prescribed: Take medicine exactly as prescribed. Do not take more or less than the recommended dose, and do not stop taking the medication without consulting your doctor.
  2. Timing of administration: Cardizem is usually taken orally, with or without food.
  3. Swallow the tablet whole: If you are prescribed tablets, swallow them whole with a full glass of water. Do not crush, break, or chew the tablets.
  4. Use extended-release formulations as directed: Cardizem may be available in extended-release formulations, designed to release the medication gradually over time.


Here are some general guidelines regarding the dosage of Cardizem:

  1. Recommended dosage: The initial recommended dosage of Cardizem for adults with hypertension (high blood pressure) is typically between 180 to 240 milligrams (mg) per day, divided into multiple doses. However, the dosage may vary based on individual factors and the severity of your condition.
  2. Titration: Your doctor may adjust the dosage gradually, based on your response to the medication and blood pressure readings. The goal is to find the lowest effective dose that effectively controls your blood pressure.
  3. Extended-release formulations: Cardizem may also be available in extended-release formulations, which are designed to release the medication slowly over time. These formulations may require less frequent dosing.
  4. Other medications: Diltiazem can interact with certain medications.

Side effects

Cardizem can cause certain side effects in some individuals. While not everyone experiences side effects, it is important to be aware of potential adverse reactions. Common side effects may include:

  1. Dizziness or lightheadedness: Some individuals may experience dizziness or a feeling of lightheadedness when taking Cardizem. It is important to get up slowly from a sitting or lying position to minimize these effects.
  2. Flushing: Cardizem can cause flushing or a warm sensation in the skin. This is usually temporary and not a cause for concern.
  3. Headache: Headaches may occur in some individuals taking Cardizem.
  4. Swelling: Medicament can cause peripheral edema, which is the swelling of the hands, ankles, or feet.
  5. Constipation or gastrointestinal upset: Some people may experience constipation, nausea, or other gastrointestinal symptoms while taking Cardizem. Increasing fluid intake, incorporating fiber-rich foods.
  6. Fatigue: Diltiazem can cause fatigue or a general feeling of tiredness. It is important to get adequate rest and avoid activities that require alertness if you feel excessively tired.
  7. Slow heart rate: Cardizem can lower the heart rate in some individuals.
  8. Other possible side effects: Rarely, Cardizem can cause more serious side effects, such as liver problems, allergic reactions, or heart rhythm disturbances. If you experience symptoms such as yellowing of the skin or eyes, severe dizziness, difficulty breathing, or irregular heartbeat, seek immediate medical attention.

It is important to note that this is not an exhaustive list of side effects, and different individuals may have different reactions.


To store Cardizem properly, it is important to follow these storage guidelines:

  1. Temperature: Store tablets at room temperature, ideally between 68°F (20°C) and 77°F (25°C). Avoid exposing the medication to extreme temperatures, such as freezing or excessive heat.
  2. Moisture: Keep Cardizem in its original tightly closed container to protect it from moisture. Avoid storing it in the bathroom or any area with high humidity. Moisture can affect the stability and effectiveness of the medication.
  3. Light: Protect medicine from direct sunlight or excessive light exposure. Store it in a cool, dry place away from windows or areas with intense light.
  4. Childproof container: Make sure to keep Cardizem in a childproof container and store it out of reach of children. Medications should always be stored in a secure location to prevent accidental ingestion.
  5. Proper labeling: Keep pills in its original packaging or container with the appropriate labeling intact. This helps to identify the medication and provides important information, such as expiration date and dosage instructions.
  6. Expiration date: Check the expiration date on the packaging and do not use Cardizem beyond that date. Expired medications may not be as effective and can potentially be harmful.
  7. Disposal: When disposing of Diltiazem, follow proper disposal guidelines. Do not flush it down the toilet or pour it down the drain unless instructed to do so.


An overdose of Cardizem can be potentially serious and should be treated as a medical emergency. Here are some important points to consider regarding overdose:

  1. Contact emergency services: Call your local emergency helpline or go to the nearest emergency room immediately if you suspect an overdose of Diltiazem. Time is critical in such situations.
  2. Provide necessary information: When seeking medical help, provide information about the medication taken, the dosage strength, and the amount ingested.
  3. Symptoms of overdose: Symptoms of a Cardizem overdose may include excessively low blood pressure (hypotension), slow heart rate (bradycardia), fainting, dizziness, confusion, difficulty breathing, or even loss of consciousness. It is important to inform the medical professionals about any symptoms experienced.
  4. Do not induce vomiting: Unless instructed to do so by medical professionals, do not attempt to induce vomiting. Vomiting may not effectively remove the medication from the body and can potentially cause further harm.

Missed Doses

If you miss a dose of Cardizem, here are some general guidelines to follow:

  1. Take the missed dose as soon as you remember: If you realize that you missed a dose, take it as soon as possible. However, if it is close to the time for your next scheduled dose, skip the missed dose and resume your regular dosing schedule. Do not take a double dose to make up for the missed one.
  2. Set reminders: To help remember to take your doses consistently, you may find it helpful to set reminders or alarms on your phone, use a pill organizer, or incorporate Diltiazem into your daily routine at a specific time. This can assist in maintaining a regular dosing schedule.
  3. Follow regular dosing schedule: It is important to continue taking Cardizem as prescribed. Do not adjust the dosages or frequency.
  4. Do not double dose: Do not take an extra dose of Cardizem to make up for a missed dose. Taking more than the prescribed amount can increase the risk of side effects and complications.

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