Rogaine hair fall question after discontinuation

[ILikeMyHair]

I got an 2500 graft FUT transplant on my hairline.

I have some shock loss above and below the FUT scar.

 

The clinic recommends to use 5% rogaine on both donor scar area and the recipient area for 1 year.

 

Is it necessary to use rogaine for donor and recipient area? What's the point of getting a transplant if you had to use medication afterwards too. Also if I discontinue rogaine will my hair at the donor area fall out? Also will the transplanted hair fall out?

 

I started using it day before yesterday and today I after applying it I feel a bit lightheaded. I don't really like this feeling and can't see myself feeling like this for a year. I'm just hoping to use it for 4 month on the donor area till the shock loss hair grow back and in the receipient area for 6-7 months till I see a decent result. IS this a good plan?