I have to switch to Risperdal (risperidone) from Invega due to cost - I can't get free samples anymore.

I'm trying to read those ultra-fine-print patient information sheets but I am having a hard time comparing the two drugs.

Can someone tell me in easy terms HOW MUCH more weight I will gain on Risperdal vs. Invega? Like what % more likely am I to gain weight?

Can you figure that out from the pamphlets, or not?

Quite frankly, if the Risperdal is going to make me gain 100 pounds, I just might be willing to pay the $300 bucks a month for the Invega, not to.

I called the maker of the drugs (both are made by the same pharm company) and they couldn't tell me.