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Diltiazem is used to treat high blood pressure (hypertension). It belongs to a class of drugs called calcium channel blockers (CCBs). It helps relax blood vessels and reduce the heart's workload. Controlling hypertension can reduce the risk of stroke and heart attack. The brand version is Cardizem.
Please note: At this time, this medication is only prescribed as a refill at Dr. B.
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How Dr. B treats high blood pressure
Tell us about your condition with a $15 online consultation—no video call necessary.
A medical provider will review your information and prescribe treatment, if appropriate.
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About Diltiazem (Generic Cardizem)
How does it work?
Diltiazem is a medication that belongs to a class of drugs known as calcium channel blockers. It works by relaxing blood vessels and increasing blood flow to your heart so it doesn’t have to work as hard.
What does it treat?
Diltiazem is used to treat conditions like:
- High blood pressure (hypertension)
- Abnormal heart rhythms
What forms does it come in?
This hypertension medicine is available in various forms, including tablets and capsules.There are also extended-release forms, which provide a slower and steady release of the drug over time for once-daily dosing.
Diltiazem vs. Cardizem
Diltiazem and Cardizem are essentially the same medication. Diltiazem is the generic name, while Cardizem is a brand name. Both work to relax blood vessels, making them effective for treating conditions like high blood pressure and certain heart rhythm disorders.
How much will it cost?
Dr. B offers online consultations for $15—which is less than most copays. If a high blood pressure prescription is appropriate, your out-of-pocket medication cost will depend on your insurance and where you decide to get your prescription filled. With a drug discount card, prices for Diltiazem 120 mg (60 tablets) start at $9.00.
* Prices shown with drug discount card applied. Price may differ depending on location.
Diltiazem 120 mg (60 tablets)*
More High Blood Pressure (Hypertension) Prescription Refills
Looking for a different hypertension medication? Here are some options.
Diltiazem (Generic Cardizem) prescription FAQ
What are the benefits of taking Diltiazem (Generic Cardizem)?
- Lowers blood pressure
- Regulates heart rhythm
- Improves heart function
- Improves blood flow to heart
- Reduces risk of heart problems like stroke or heart attack
Who should not take this medication?
- Those who are allergic to Diltiazem
- People with a known allergy or severe reaction to Calcium Channel Blockers (CCBs)
- Pregnant women, breastfeeding or those planning to become pregnant
- Those with a history of liver problems
- People with severe heart conditions or heart failure
- People who have slow heart rate (bradycardia)
- Those with low blood pressure (hypotension)
- Those with myasthenia gravis (muscle disorder)
- People with sick sinus syndrome (a heart rhythm problem)
- Those who have second- or third-degree atrioventricular block (a heart rhythm problem)
If you have any of these conditions—or Raynaud's syndrome (a condition that causes the fingers and toes to become numb and cold), asthma, other respiratory issues, a history of significant lung diseases, porphyria (a rare blood disorder), kidney complications, or diabetes—speak with your healthcare provider before starting this medication.
Taking this medication when you have these conditions should be carefully and closely monitored by a healthcare provider.
Also tell your medical provider about any other medications you’re using before you start this hypertension treatment.
How do you take this medication?
Take Diltiazem by mouth as directed by your health provider. This medicine is usually taken four times a day. The regular tablets can be crushed or chewed. Do not crush, chew or break the extended-release tablets or capsules.
High blood pressure is a long-term (chronic) condition that can harm your organs. Medications for blood pressure are not a one-time cure. This medicine doesn't provide a complete cure for high blood pressure, so it's important to continue taking it, even if you start feeling better. If you stop taking it suddenly, this could cause dangerous problems, like heart attack or stroke. Follow your medical provider's instructions carefully.
What happens if I miss a dose?
If you miss a dose of your blood pressure medicine, take it as soon as you remember. If it's almost time for your next dose, skip the missed one. Do not double the dose to make up for the missed one.
What happens if I take too much?
Taking too much of your hypertension medicine can lead to symptoms like hyperglycemia (high blood sugar), low blood pressure, slow heart rate, breathing problems and fainting.
If you’ve taken too much Diltiazem, call your licensed provider or local poison control center (800-222-1222) immediately.
Can I get Diltiazem (Generic Cardizem) online?
You can get a prescription for hypertension pills like Cardizem through Dr. B! Complete a virtual consultation with a licensed medical provider to get started.
Medical information reviewed by Dr. Sudip Bose
Sudip Bose, MD is a world-leading emergency medicine physician, combat veteran, professor, and entrepreneur. With a wide variety of experience, Dr. Bose is focused on endeavors with large-scale health and educational impact. He founded The Battle Continues, a nonprofit assisting veterans with healthcare needs. Dr. Bose is also a clinical professor at Texas Tech and University of Illinois College of Medicine. He is a graduate of the honors program at Northwestern University, where he continued his medical school education at The Feinberg School of Medicine.
Tell your health provider if you experience side effects that bother you or don’t go away. The most common side effects are:
- Swelling of arms, legs, hands or feet
- Dizziness or lightheadedness
- Stomach upset
- Constipation or diarrhea
- Dry mouth
Contact your healthcare provider right away (or call 911) if your symptoms are more severe. Watch for signs of a serious problem, including difficulty breathing, yellowing skin or eyes, chest pain, sudden weight gain, red or purple rash with blistering/peeling or fever.
Don’t drive until you know how this medicine affects you. Be extra careful in the first hours after taking your pill because of the risk of dizziness or lightheadedness.
Getting your blood tested regularly is important to monitor your overall health. It's a good idea to have your bloodwork checked, which may include tests for renal function, glucose levels or potassium levels in your blood. These routine checks help ensure you are in good health and catch any potential issues early.