Dude, Please do not take finasteride. It's a poison that will mess up with your hormones. I have been on fin for 6 years and stopped cold turkey. It did so much damage that it took me more than a year to get my hormones level to normal.
The claim of only 2% of users getting sides by Merck is absurd and load of crap. You never know the extent of damage this medicine can cause when someone is on this pill for several years.
What's more funny that this pill doesn't even work for most of the people in even stopping hair loss let alone hair growth.