I've been on Geodon for over a year now and I lost weight on it that I'd gained on Zyprexa. Now I've regained some of it because I'm back on Zyprexa, but not as much as I did when I was just taking Z. I don't remember having congestion when I went on it, so it just may be that you're getting a cold, or maybe allergies.

I do get sleepy on Geodon which is why I take it at night, with a glass of milk or a tablespoon of peanut butter for better absorption.

Wishing you the best of luck with it.