I had to stop after 2 years. It didnt actually really work anyway as I did lose hair on the medication also.
I have stopped since 2017. My hair has just gradually been thinning in the last 5 years.
I didnt notice any big shed after stopping just gradual hairloss every year mostly in the crown.
Im a diffuse thinner so I know I will need another transplant at least probably 2 more. But it is ok for now as my hairloss is progressing quite slowly atm.
Im looking at trying to get to Zarev in a year or 2.