Propecia is the first and only FDA-approved pill that has demonstrated its ability to treat male pattern baldness on the top of the head, as well as in the middle front of the head. Unfortunately, there is not enough evidence to show that this medication will work for receding hairlines at the temples. This medication's effectiveness was demonstrated by studies that were done in men between the ages of 18 to 41-years-old who had lost a mild to moderate amount of hair on the top and middle front of their head.
You should talk to your doctor as soon as possible about this medication because the sooner you begin treatment, the more hair you will have later on. However, if you stop taking this medication, then your results will gradually disappear over the course of one year. Likewise, you should know that you may need to take this medication for three months before you begin to see it working. If you find that this medication does not work for you within 12 months, then more than likely further treatment will be of no benefit.
If you happen to miss taking a dosage, make sure that you take it just as soon as you remember to do so. However, if it is close to the time for your next dosage, then you should skip the missed dosage and continue with your regular schedule. You should never take a double dosage in order to catch up with a dosage that you missed.