i take 40mg of prozac a day. my dr. changed my dosage from 20mg/day about 2wks ago. i know it takes time to fully get into your system, however i had been taking the 20mg for 3months prior. i also take 2mg clonazepam 2x daily. hhow much is too much and when will i know how the new 40mg dosage will take full effect?