After 6 weeks is this normal
No, no medicine after a transplant is 'required'. However, there's a reason why Minoxidil is recommended by the large majority of doctors, so it would likely be in your best interest to at least try it to help with your hair growth.
Minoxidil is unnecessary after a hair transplant if it is done correctly. I have studied this and found that minoxidil offers no value to the transplanted grafts