Compare Avodart vs. Flomax

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

Avodart
(dutasteride)

Flomax
(tamsulosin)

Improves BPH symptoms and lowers your sense of urgency to urinate. Avodart (Dutasteride) can be helpful in lowering BPH symtoms and delaying your need for surgery.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
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Have you used Avodart (dutasteride)?
Worth itNot sureNot worth it
Reviews for Flomax
58%
+42% better vs. Avodart
41%
+9% better vs. Avodart
19%
+19% better vs. Avodart
Have you used Flomax (tamsulosin)?
Worth itNot sureNot worth it
Side effects
AvodartFlomax
  • Impotence 3%
  • Any side effect 1%
  • Decreased libido 2%
More Avodart side effects »
  • Dizziness 5%
  • Runny nose/ nasal congestion 5%
  • Infection 1%
  • Weakness 2%
  • Abnormal ejaculation 8%
  • Back pain 1%
  • Sore Throat 1%
  • Diarrhea 1%
More Flomax side effects »
How it works
AvodartFlomax
Avodart (Dutasteride) blocks the action of 5-alpha-reductase, an enzyme responsible for changing testosterone into dihydrotestosterone (DHT). Lower DHT levels prevents the prostate from growing.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
AvodartFlomax
Prescription onlyPrescription only
Available as
AvodartFlomax
  • Pill
  • Pill
Used for
AvodartFlomax
  • Enlarged Prostate BPH
Risk factors for serious side effects
AvodartFlomax
  • Men age 55 or older
  • Women of childbearing age
  • Breast-feeding
  • Men who are older
  • Taking medicines that cause sexual side effects
Detailed Avodart (dutasteride) 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 real people or animals found harmful effects on unborn babies. If you’re pregnant, the risks to your unborn baby outweigh the benefits.

Food
AvodartFlomax
  • Take Avodart (Dutasteride) at the same time every day, with or without food.
No food related info.
Pain
AvodartFlomax
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
AvodartFlomax
  • Improves BPH symptoms, making it easier to urinate.
  • Patients taking Avodart (Dutasteride) in clinical trials had a 54-78% chance of seeing improvement in their symptoms.
  • If you're balding, Avodart (Dutasteride) can also help your hair grow back.
  • Most side effects go away after your body gets used to Avodart (Dutasteride).
  • Actually shrinks the size of your prostate, instead of only improving the symptoms like other BPH drugs (eg. Cardura or Hytrin).
  • Can be combined with Doxazosin (Cardura), an alpha-adrenergic antagonist, if your symptoms are more severe.
  • 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
AvodartFlomax
  • Women who can get pregnant shouldn’t touch or handle Avodart (Dutasteride).
  • You need to take Avodart (Dutasteride) for at least 6 months before your prostate gets small enough for symptoms to improve.
  • Lowers your PSA level and can hide symptoms of prostate cancer.
  • Available as a generic medication.
  • 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
AvodartFlomax
  • Take Avodart (Dutasteride) at the same time every day, with or without food.
  • Hang in there since it can take up to 3 months before you notice improvements.
  • You might have a loss of sexual desire or arousal when you first start taking Avodart (Dutasteride).
  • Swallow the capsule whole and don't open it since the powder can irritate your mouth.
  • Women who can get pregnant shouldn’t touch Avodart (Dutasteride).
  • Tell your doctor if you notice an unusual rash, swelling in your mouth, tightness in your chest, or trouble breathing.
  • 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 AvodartSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Avodart (dutasteride)?
Worth itNot sureNot worth it
More about FlomaxSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Flomax (tamsulosin)?
Worth itNot sureNot worth it