I take my 54mg of Concerta (time released Ritalin - methylphenidate - ie, pure government speed) every morning. 6th startup now? They hit about 100 people and

I take my 54mg of Concerta (time released Ritalin - methylphenidate - ie, pure government speed) every morning. 6th startup now? They hit about 100 people and I move on. Wonder why? Job wise in the startup I am the "fixer". The get it done guy. I wonder why?