Dear user, I and lot's of my former friends were on Zyprexa. It ruined my teeth. Weight gain is the least of symptoms. I even reported it through old Psych central several years ago. Be careful if you have light,and damagable teeth,and a choice, don't use it. Or, try using it less. Wouldn't recommend it to anybody.
My friend M. took Zyprexa 20 mg per day,he lost teeth,and had psycotic episodes plus he didn't stop having hallucinations.
My former boyfriend was banned of Z, his doctor didn't want him to suffer. I got shots of Zyprexa even though I didn't need it,I was never psychotic. It was so bad.
Read the instructions carefully, and be aware. Best of luck.