Is it safe to have PRP after Hair Transplant surgery, or could it cause the hair to fall out?

It is probably safe to have PRP after hair transplant surgery but there is no need for PRP for the success of surgery.

Hello,
Yes it is absolutley safe to get prp aftar hair transplant operation. Prp helps with hair growth and prevents shedding

The answer is that we don't know as there are no studies demonstrating an added benefit.  Many transplant surgeons will pre inject both the donor scalp and recipient sites with PRP prior to surgery as well as during surgery.  In addition, they will soak the grafts in PRP increasing their survival.  Some will even continue PPR injections post surgery and have reported significant increase in results and reduction in thinning out of the existing hair (shock loss) in the donor and recipient sites. 

I routinely recommend PRP in conjunction with hair transplant for my hair restoration patients. PRP can be performed before, during, or after a hair transplant session. I consider PRP an additional treatment that can help with the overall hair restoration result just like minoxidil, propecia, and others.
I always recommend seeing a fellowship-trained hair restoration surgeon to discuss all hair restoration options in detail.
All the best,

While there is no good studies that show that PRP will improve a hair transplant, I have seen it "wake up" follicles that have been slow to grow at the 6 month interval. I generally don't routinely use PRP with hair transplants unless growth is behind the curve.