Compare Proscar vs. Flomax
Head-to-head comparisons of medication uses, side effects, ratings, and more.
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.
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.
- 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.
- 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.
- Enlarged prostate (BPH)
- Erectile dysfunction19%
- Decreased sex drive10%
- Low blood pressure upon changes in posture9%
- Abnormal ejaculation7%
- Abnormal sexual function3%
- Enlarged male breasts2%
- Runny nose/ nasal congestion13%
- Abnormal ejaculation8%
- Back pain7%
- Sore Throat6%
- Chest pain4%
- 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
- Low blood pressure
Taking medications for high blood pressure
History of "sulfa" allergies
- Floppy iris syndrome
Cataract or glaucoma surgery
- Heat stroke
...and 2 more risk factors