I take finasteride currently fighting for the onset of action of androgenetic alopecia, which has been in my family like a curse from hell brought. Anyway, I wonder if it even matters if you take Propecia or Proscar. I Used To take Propecia 1 mg, marketed specifically for male pattern hair loss, but now I am among Proscar 5 mg, which is marketed to prevent the development of prostate cancer. I use a pill splitter 5 mg tablet a cut in second 5 mg halves. My real concern lies in the cutting area of the pill. I use a second 5 mg per half day, the other half in the blister, which is clearly now burst exposure of the ingredients of the pill to the atmosphere for about 24 hours. Is that OK?!? I mean, there is no denaturation of the ingredients or mitigate their effects when exposing this pill cutting oxygen supply? Is it still effective? It is cheaper to cut Proscar and cut it up, as Propecia buy it and swallow it whole. Help.