In my experience, I started Finasteride about 6 months before my hair transplant and continued it afterward. It helped to stabilize my hair loss and improve the overall thickness of my existing hair. I found that starting Finasteride before the transplant helped to potentially prevent further hair loss in the future, which was a key goal for me.
However, it's important to note that Finasteride can have side effects for some individuals, so it's best to discuss this with your doctor before starting. Additionally, the cost of Finasteride can add up over time, so that's something to consider as well. Ultimately, I recommend discussing with your transplant surgeon and weighing the pros and cons before making a decision.