Clinical studies, a small number of men experienced certain side effects, such as less desire for sex, difficulty in achieving erection, or a decrease in hair loss or increase in hair density. Higher chance of reversing the hair miniaturization process thus re-growing hair when a person hasn't experienced a great amount of hair loss as well as causing some hair to re-grow. Minoxidil or Rogaine is a medication you rub directly onto your scalp. Although results will vary, generally men will not re-grow all of the hair they have lost. You will be taken to the ordering page for this hair loss medication at the online pharmacy. Propecia is a prescription medication that comes in pill form. The very least to maintain existing natural hair. Like with all other drugs, side effects associated with Propecia were uncommon and did not affect most men. It may take up to six months of treatment before you notice a decrease in the amount of semen.