This is my info about Proscar in Australia:
Proscar is indicated in the treatment and control of prostatic adenoma to produce regression of enlarged prostate, improve urinary drainage and alleviate symptoms associated with enlarged prostate.
Proscar is not indicated for women and children. Proscar is contraindicated in the following situations: Hypersensitivity to any component of this product; task – use in women when they are or may potentially be pregnant (see PRECAUTIONS: Pregnancy and exposure to finasteride – risk to male fetuses).
The recommended dose is one 5 mg tablet daily, before or after food. Although rapid improvements can be seen and is required for a period of at least 6 months therapy to assess whether we obtained a favorable response. Dosage in renal impairment: No dose adjustment is necessary in patients with varying degrees of renal impairment (creatinine clearance decreased even up to 9 ml / min) as pharmacokinetic studies did not show any change in the elimination of finasteride. Dosage in the elderly: No dosage adjustment is necessary although pharmacokinetic studies indicated the elimination of finasteride somewhat reduced in patients over 70 years.
General: Since it is possible that the favorable response Proscar not manifest immediately, patients with large residual urine volume and / or severely diminished urinary flow should be carefully monitored for obstructive uropathy. Prostate Cancer: Both Proscar before initiating therapy and periodically thereafter, it is recommended that patients be screened and other digital rectal exams to detect a possible prostate cancer. ASP is used increasingly more for prostate cancer detection. Generally a baseline PSA> 10 ng / mL (Hybritech) requires further investigation and possible biopsy; the value of PSA between 4 and 10 ng / ml is good for investigations to be continued. The physician should however be aware that a baseline PSA
How Proscar Works video:
Thats all what i know!