I started taking diphenhydramine as directed to fall asleep. Over time it wasnt enough so I took more. However, I found that when I took a higher dose it gave me a sensation of energy and happiness for about 1/2 to 1 hour. Those effects would gradually turn into a calmer state, but made it slightly harder to focus. Gradually the effects wore off in about 1 to 2 hours. Over time I came to know how much and how often to take to get those effects and feel that energizing happy pep; about 200mg every 3 to 4 hours a day. Side note; doesn't make me sleepy. I have been taking this regiment now for 13 years (which would equal about 5,931,250mg of diphenhydramine). This is the first time I have really shared this. Now I am wondering if I damaged anything, what will happen if I continue, and if so can I take it with Ritalin (dr just prescribed) ?