Is there medication required for post hair transplant treatment?

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There has been mixed opinions of people who opted for hair transplant specially in case for male bald pattern on crown or alopacia.
Just want to get genuine fact from experts if it true.
Few male adults who have done hair transplant said that there is medication need post hair transplant and it goes on for indefinite time. So as per their advise hair transplant is not good for health even though it gives luxury in appearance.
Few have said that it is worth for appearance and leave medication when you think you do not want hairs anymore. So question is post hair transplant treatment is there medication required? If yes how long and what frequency medicines needs to be taken? As I heard that the hair transplant is long term benefit than hair sewing so do you lose hairs after stopping medicines?
Awaiting advice.