Is there any way to buy hair loss medication cheaply?

I was prescribed hair loss medication and am planning to take it, but I heard that I need to take it long term.

There are also people who say it is effective or that you have to take it for life, so it is a cost issue.

I'm thinking of purchasing it and prescribing it at the most cost-effective price possible. Does anyone know?

I would like to ask for information~~