Jay Campbell's new TOTBible includes some good information on this with annotated studies that support this. I have been dosing 5 mg tadalafil for a year and the results are very clear. Cialis is a staple in Gene Devine's stack that many of us are using. I am a patient at Abraham Morgantaler's clinic and his before sex and I was told at my last appointment last week that I can dose as high as 40 mg before sex if needed. Morgantaler considers it very same if there is no heart ailments, hematocrit or blood pressure issues.