I found the following article on weight gain as a side effect of Zyprexa. After putting on 30 lbs. in less than a month the claim that the drug causes "substantial weight gain" has been substantiated in my mind. I would like to switch to Abilify but it is very expensive and until I can get samples I will continue taking the Zyprexa.
So I have decided for the first time in my life (besides my days trying to make weight for wrestling in high school) to start dieting. I don't know if it will stick or not, but I will try to eat a healthy and modest breakfast, lunch, and dinner, with no snacking in between. This fasting will be a very difficult discipline, with my appetite out of control (it seems that Zyprexa affects the enzyme that regulates eating "behavior," which is probably responsible for this).
Zyprexa: Study Finds Reason for Weight Gain
According to a recent report, the drug increases the activity of an enzyme called AMPK in cells in the part of the brain that regulates eating behavior. AMPK is shorthand for the AMP-activated protein kinase (AMPK). The cells that make up our bodies need a constant supply of energy to function. AMPK is key in regulating cellular energy, and serves as a gas gauge by sensing how much energy a cell has.The study was published in the Proceedings of the National Academy of Sciences.
AMPK's increase was because the antipsychotic drugs were interfering with the important protein histamine.