questions about minoxidil

I'm going to start using minoxidil this month, the dermatologist recommended I use it for 3 months.

My question is if after 3 months I will stop using it for a while or if I will have to take it again, can anyone here tell me what it was like for you?

Does minoxidil alone work or do you need other medicines to take along with it?

Is mesotherapy a good idea? I found it very expensive.