Looking for where I could go to get more info. My doctor prescribed 10 mg. This only worked for a short period of time as expected. My doc moved me up to 20mg but for several days I took two 10mg at the same time, to use up the remaining 10mg that I had. I am now taking a single 20mg but it doesn't last as long as taking two 10mg. So now I want to go back to taking two 10 mgs. Has anyone heard of this happening? Where can I go to get more info on this? Thanks