when you have an hair transplant do have to take any drugs i.e propecia?
No, medications are not required for you to have a hair transplant. Many patients do not want to take medications. This is why they have a transplant instead. Hair loss is a life long process, however. The rationale for taking medications in addition to a hair transplant is that they help to slow the progression of hair loss. This can help reduce the need for future hair transplants to replace the hair you loose over time.
In addition, medications can help you have a fuller head of hair than might be possible through hair transplants alone. Like it or not, the donor area supply is limited. There is only so much we can do for any single individual. Medications can help fill the void should your hair loss out tax the amount of donor hair that you have to transplant to the areas of loss or thinning.