Congratulations for your hair transplant
. Hope it grows out well.
The medicines your doctor has prescribed is to prevent further hair fall
in the temporary hair zone.
Ideally these medicines should be continued for life or at least as long as you do not want another session. When you stop using the medicines, your existing hair ( and not the transplanted hairs) will start thinning again.
Hope this has cleared some of your concerns. For more information about side effects of medicines you can read my hair transplant blog.
Dr. Sharad Mishra
Cosmetic & Hair Transplant Surgeon
New Delhi, India.