Millions of men around the world take finesteride daily to help combat hairloss. The vast majority get no noticeable negative side effects. Lots of men actually get higher libido while on it do to the test increase you get from it. There is a small risk that it will negatively affect you but the risk is small and in almost every case reversible once the medication is stopped.
Its a great drug that has gotten a bad reputation based on a very small amount of unlucky individuals based on how many its helped which is a shame.