Compare Cardura vs. Flomax

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

Cardura
(Doxazosin)

Flomax
(tamsulosin)

Lowers blood pressure and makes it easier to urinate. For men, Doxazosin will help make it easier to urinate so that you're not getting up a lot at night. It's a last-choice treatment for high blood pressure.Makes it easier to urinate. Flomax (tamsulosin) is a good treatment for an enlarged prostate if medical treatment is needed, but it can reduce your sex drive and takes time to kick in.
Reviews & ratings
Filter group. All currently selected
Filter group. All currently selected
3.68Cardura
Reviews for Cardura
38%
of people (All ages) say Cardura is worth it
21%
say it works well
18%
say it's a big hassle
101 reviews
Have you used Cardura (Doxazosin)?
Worth itNot sureNot worth it
Reviews for Flomax
58%
-20% worse vs. Cardura
41%
-20% worse vs. Cardura
19%
+1% better vs. Cardura
Have you used Flomax (tamsulosin)?
Worth itNot sureNot worth it
Side effects
CarduraFlomax
  • Pain 1%
  • Hypotension 2%
  • Nausea 1%
  • Dyspnea 2%
  • Edema 2%
  • Somnolence 2%
More Cardura side effects »
  • Insomnia 1%
  • Drowsiness 1%
  • Cough increased 1%
  • Sore Throat 1%
  • Diarrhea 1%
  • Back pain 1%
  • Weakness 2%
More Flomax side effects »
How it works
CarduraFlomax
Doxazosin is a selective alpha blocker. It relaxes the urethra and prostate, which makes it easier to urinate. It also lowers blood pressure by relaxing blood vessels.Flomax (tamsulosin) is an alpha-1 blocker. It specifically targets and relaxes muscles in your prostate, which makes it easier to urinate.
Type of medication
CarduraFlomax
Prescription onlyLower-cost generic availablePrescription onlyLower-cost generic available
Available as
CarduraFlomax
  • Pill
  • Extended release
  • Pill
Used for
CarduraFlomax
  • Enlarged Prostate BPH
Risk factors for serious side effects
CarduraFlomax
  • Age 65 years or older
  • Cataract surgery
Detailed Cardura (Doxazosin) risks & warnings »
  • Taking medications for high blood pressure
  • History of "sulfa" allergies
  • Cataract or glaucoma surgery
  • Alcohol use
  • Heavy exercise
Detailed Flomax (tamsulosin) risks & warnings »
Pregnancy

Research studies with animals found harmful effects on unborn babies. It hasn’t been properly studied in humans. The benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

Food
CarduraFlomax
  • Take the extended release tablet with breakfast.
No food related info.
Pain
CarduraFlomax
No pain related info.
  • Can cause dizziness, muscle pain, headache, stuffy/runny nose and low blood pressure. Get up slowly when sitting or lying down to avoid feeling dizzy or fainting.
Upsides and benefits
CarduraFlomax
  • A first-choice treatment for enlarged prostate. Makes it easier to urinate.
  • Flomax (tamsulosin) works just as well as similar medications but with fewer and less severe side effects.
  • Helps make urinating easier.
  • Available in generic.
  • Also available in a combination form with another medication to treat severe symptoms of enlarged prostate.
  • Simple once daily dosing.
Downsides and risks
CarduraFlomax
  • A last-choice treatment for high blood pressure because other medicines are more effective at preventing heart disease. Your doctor might add it to a medicine you're already taking if your blood pressure is still too high.
  • Flomax (tamsulosin) only treats the symptoms of enlarged prostate. It doesn't make the prostate smaller or stop it from getting bigger.
  • Has to be taken at the same time every day.
  • It can take up to one month to see the full effects of Flomax (tamsulosin).
  • Can reduce sex drive.
  • Flomax (tamsulosin) can't be stopped suddenly, so you'll need to talk to your doctor about how to stop taking it safely.
Tips from our pharmacists for people taking the medication
CarduraFlomax
  • Can cause dizziness or fainting in the first few days.
  • Check your blood pressure 1 week after starting this medicine, and tell your doctor if it hasn't improved.
  • Can cause fatigue or headache.
  • Take the extended release tablet with breakfast.
  • You might need to check your blood pressure from time to time while taking this medicine.
  • If side effects don't go away, talk to your doctor about alternatives.
  • Take Flomax (tamsulosin) 30 minutes after the same meal every day.
  • Do not crush, chew, or open Flomax (tamsulosin) capsules.
  • Can cause dizziness, muscle pain, headache, stuffy/runny nose and low blood pressure. Get up slowly when sitting or lying down to avoid feeling dizzy or fainting.
  • Do not drive, operate machinery, or engage in dangerous activity until you know how Flomax (tamsulosin) affects you.
Learn more
More about CarduraSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Cardura (Doxazosin)?
Worth itNot sureNot worth it
More about FlomaxSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Flomax (tamsulosin)?
Worth itNot sureNot worth it