From the prescribed edifices it seems you have male pattern baldness
Your doctor has given a standard prescription for the above mentioned concern. Though finesteride tablets are said to reduce libido but it is not seen in most of the cases( seen in 1 to 15 percent cases). Moreover it is not commonly seen with low dose 1 mg finesteride. The decreased libido or erectile dysfunction
is said to be reversible once the therapy is discontinued however few studies emphasise that it could persist after discontinuation of the drug. So it is completely your choice whether you want to take it or not. If you do not wish to take the same you may take saw palmetto supplement.
Hope that helps.