Compare Calan vs. Catapres

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

Calan (Verapamil)

Prescription only

Catapres (Clonidine)

Prescription only
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.

3.8/ 7 average rating with 43 reviewsforCalan
Lowers blood pressure.

Catapres (Clonidine) is a good addition if you need more than one medicine to control your blood pressure, but it has a lot of side effects. You can't miss doses.

4.3/ 7 average rating with 78 reviewsforCatapres
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.
  • Can be added to other blood pressure-lowering medicines if you need additional blood pressure control.
  • Available in a weekly patch for people that aren't good at taking medicine by mouth.
  • Works in the brain, so it can help treat some nervous system and psychiatric conditions.
  • Under the brand name Kapvay, it's used to treat ADHD in children and teenagers.
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 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.
  • Has a lot of side effects compared to other blood pressure-lowering medicine because it works in the brain.
  • The pill form can make some people sleepy, dizzy, and have dry mouth.
  • You can't miss doses. Stopping Clonidine suddenly can cause your blood pressure to go up suddenly, which raises the risk of heart attack and stroke.
Used for
Dosage forms
  • Pill
  • Extended release
  • Delayed release capsule
  • Pill
  • Extended release
  • Patch
Price
Lowest price near you
$8
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Lowest price near you
$7
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Reviews
43 
35%
think this treatment is worth it
33%
think this treatment works well
21%
think this treatment is a hassle

Have you used Calan (Verapamil)?

Leave a review
78 
42%
think this treatment is worth it
33%
think this treatment works well
35%
think this treatment is a hassle

Have you used Catapres (Clonidine)?

Leave a review
Side effects
5possible side effects
  • Constipation
    7%
  • Headache
    5%
  • Dizziness
    4%
  • Lethargy
    3%
  • Dyspepsia
    3%
See more detailed side effects
10possible side effects
  • Erythema / pruritis
    26%
  • Dry mouth
    25%
  • Drowsiness
    12%
  • Localized vesiculation
    7%
  • Fatigue
    6%
  • Headache
    5%
  • Allergic contact sensitization
    5%
  • Hyperpigmentation
    5%
  • Lethargy
    3%
  • Sedation
    3%
See more detailed side effects
Risks and warnings
  • Heart failure

    Severe left ventricular dysfunction (ejection fraction <30%)

    ...and 1 more risk factors

  • Elevated liver enzymes

    History of liver disease

  • Heart rhythm problems

    History of kidney disease

    ...and 1 more risk factors

See more detailed risks and warnings
  • Withdrawal

    Sudden discontinuation of medicine

  • Driving impairment

    Taking with alcohol

    ...and 1 more risk factors

  • Low heart rate (bradycardia)

    Age 65 years or older

    ...and 1 more risk factors

See more detailed risks and warnings