The price of metformin has many variables. Provincial or private insurance coverage, the required daily dose, as well as preference for taking generic or brand-name pills will all impact how much metformin costs in Canada. Typically 500mg daily is the starting dose, and often patients can take up to 1000mg twice daily. This means a three-month prescription for a brand version of the pill could cost up to $90 per month or as low as under $10 for the generic version.