Well finasteride is the main "weapon" against hairloss, because it decreases the conversion of DHT in the body. So you should maintain what you have atleast.
You might not get any/a lot of regrowth if that's your goal, but it will stabilize the shedding(assuming you respond fairly well). If you want temple regrowth then you need a growth stimulant like minoxidil or something else, but even then it's hard.
I also got heart palpitations when using minoxidil, but I used it on the face(for beard growth).. I began to use less and it kinda disappeared. There's also the foam version but it's more expensive.. So yeah, it's a real side effect for some people.
