You didn’t say what you are taking finasteride for, so I’m going to assume that it’s for hair loss.
As a general rule of thumb for all medications, I’d suggest starting with a lower dose of the medication, and titrating upwards.
Having said that, more than a few studies have shown that finasteride has no increased dose response effectiveness. Ie if a lower dose doesn’t work well, a higher dose is unlikely to work as well.
So if I were you, I’d start with 0.5 mg and watch for results and side effects. If it works well already, no need to use 1 mg.
