Medicine isn't a complete science....it doesn't have all the answers...it is still an art form. And yup, we will try this medication, if it doesn't work...I'll charge you again to write another prescription for you to pay for, and if that doesn't work...we will continue down this path. We are all guinea pigs...the only folks that benefit are the insurance companies, big pharma and the docs.... Wotta system... only the weathermen have it better.