Compare Diltiazem vs. Calan

Head-to-head comparisons of medication uses, side effects, ratings, and more.

Cardizem (Diltiazem)

Prescription only

Calan (Verapamil)

Prescription only
Lowers blood pressure and controls heart rate.

Diltiazem works well to lower blood pressure and prevent chest pain, but you have to be okay with avoiding alcohol. You can't miss doses, and you might get persistent swelling.

3.5/ 5 average rating with 105 reviewsforDiltiazem
Lowers blood pressure and controls heart rate.

Verapamil works well to lower blood pressure and prevent chest pain, but you have to be okay with avoiding alcohol. You can't miss doses, and you might get persistent swelling.

2.9/ 5 average rating with 43 reviewsforCalan
Upsides
  • A first-choice blood pressure treatment for many people.
  • Calcium channel blockers work especially well for African Americans to lower blood pressure.
  • You can take it alone or with other medicines to help lower blood pressure.
  • Lowers the risk of heart attack and stroke.
  • Prevents heart-related chest pain (angina) if you take it regularly.
  • Treats certain abnormal heart rhythms.
  • A first-choice blood pressure treatment for many people.
  • Calcium channel blockers work especially well for African Americans to lower blood pressure.
  • You can take it alone or with other medicines to help lower blood pressure.
  • Lowers the risk of heart attack and stroke.
  • Prevents heart-related chest pain (angina) if you take it regularly.
  • Treats certain abnormal heart rhythms.
Downsides
  • Calcium channel blockers can cause swelling in your limbs. If this happens for you, it probably won't get better over time, so talk to your doctor about alternatives if it bothers you.
  • Women are more likely to have side effects (especially swelling) from Diltiazem than men.
  • You can't miss doses. Stopping Diltiazem suddenly can cause your blood pressure to go up suddenly, which raises the risk of heart attack and stroke.
  • Some brands of Diltiazem have to be taken with food, so listen carefully for instructions from your doctor or pharmacist.
  • Not a good medication for you if you drink alcohol.
  • Calcium channel blockers can cause swelling in your limbs. If this happens for you, it probably won't get better over time, so talk to your doctor about alternatives if it bothers you.
  • Women are more likely to have side effects (especially swelling) from Verapamil than men.
  • You can't miss doses. Stopping Verapamil suddenly can cause your blood pressure to go up suddenly, which raises the risk of heart attack and stroke.
  • Not a good medication for you if you drink alcohol.
Used for
Dosage forms
  • Pill
  • Extended release
  • Extended release capsule
  • Pill
  • Extended release
  • Delayed release capsule
Price
No pricing information available
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Reviews
105 reviews so far
52%
saidit'sworth it
49%
saiditworked well
16%
saidit'sa big hassle

Have you used Cardizem (Diltiazem)?

Leave a review
43 reviews so far
35%
saidit'sworth it
33%
saiditworked well
21%
saidit'sa big hassle

Have you used Calan (Verapamil)?

Leave a review
Side effects
6possible side effects
  • Edema
    5%
  • Headache
    5%
  • Dizziness
    4%
  • Asthenia
    3%
  • First degree AV block
    2%
  • Bradycardia
    2%
See more detailed side effects
5possible side effects
  • Constipation
    7%
  • Headache
    5%
  • Dizziness
    4%
  • Lethargy
    3%
  • Dyspepsia
    3%
See more detailed side effects
Risks and risk factors
  • Skin rashes
  • Abnormally slow heart rate
    • Taking digoxin or beta-blockers at the same time
  • Sudden liver disease
    • History of liver disease
See more detailed risks and warnings
  • Heart failure
    • Severe left ventricular dysfunction (ejection fraction <30%)
    • Taking beta-blockers
  • Low blood pressure
  • Elevated liver enzymes
    • History of liver disease
  • Heart rhythm problems
    • History of kidney disease
    • History of liver disease
See more detailed risks and warnings