Is it safe to use anti dandruff shampoo after FUE hair transplant?

Hello,
Dry scalp is fairly common after hair transplantation.  Lots of solutions here including use of conditioner, antibiotic ointment, vaseline.  A great first step is to contact your hair transplant surgeon and see what solution works best for you.  
Best,
Dr. Anil Shah

Use any hair products that your doctor recommends. If you have concerns then ask your doctor for clarifications.  There should be no issue with dandruff shampoo but your doctor may have a different concern related to your particular case.

Yes, at 3-4 weeks, you can use any anti-dandruff shampoo you wish. All of the crusts should be done and everything should be healed.