Compare Proscar vs. Flomax

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

Proscar (finasteride)

Prescription only

Flomax (tamsulosin)

Prescription only
Improves prostate symptoms and lowers your urge to urinate.

Proscar (finasteride) reduces prostate size and relieves symptoms of enlarged prostate, but can cause a loss of sexual desire or arousal when you first start taking this medication.

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.

4.7/ 7 average rating with 85 reviewsforFlomax
Upsides
  • In studies, Proscar (finasteride) improved prostate symptoms during the first year of taking it. This effect continued for another 5 years. Proscar (finasteride) also lowered the need for prostate-related surgery.
  • Improves symptoms, making it easier to urinate.
  • Can be used alone or in combination with doxazosin (Cardura) to further help improve symptoms.
  • Proscar (finasteride) is generally well tolerated. Side effects usually have been mild and temporary.
  • Available as a generic.
  • 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
  • You need to take Proscar (finasteride) for at least 6 months before your prostate gets small enough for symptoms to improve.
  • You cannot donate blood while using this drug nor for 1 month after stopping.
  • This drug may increase the risk of a type of prostate cancer.
  • Proscar (finasteride) may lower sperm counts in men, but they remained within the normal range and this side effect was reversible once Proscar (finasteride) was stopped.
  • Although uncommon, some people had sexual side effects that included problems with erection, orgasm, and low sex drive.
  • 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.
Used for
  • Enlarged prostate (BPH)
Dosage forms
  • Pill
  • Pill
Price
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$8.67
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$11.45
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Reviews
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85 
58%
think this treatment is worth it
41%
think this treatment works well
19%
think this treatment is a hassle

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Side effects
10possible side effects
  • Erectile dysfunction
    19%
  • Decreased sex drive
    10%
  • Low blood pressure upon changes in posture
    9%
  • Dizziness
    7%
  • Abnormal ejaculation
    7%
  • Weakness
    5%
  • Abnormal sexual function
    3%
  • Headache
    2%
  • Drowsiness
    2%
  • Enlarged male breasts
    2%
See more detailed side effects
10possible side effects
  • Headache
    19%
  • Dizziness
    15%
  • Runny nose/ nasal congestion
    13%
  • Infection
    9%
  • Weakness
    8%
  • Abnormal ejaculation
    8%
  • Back pain
    7%
  • Sore Throat
    6%
  • Diarrhea
    6%
  • Chest pain
    4%
See more detailed side effects
Risks and warnings
  • Prostate-specific antigen (PSA) levels

    Proscar (finasteride) use for 6 months or longer

  • Prostate cancer

    Men aged 55 years or older

    ...and 1 more risk factors

See more detailed risks and warnings
  • Low blood pressure

    Taking medications for high blood pressure

  • Rash

    History of "sulfa" allergies

  • Floppy iris syndrome

    Cataract or glaucoma surgery

  • Heat stroke

    Alcohol use

    ...and 2 more risk factors

See more detailed risks and warnings