I've been in seroquel for years and never had weight gain. I'm currently on 150mgs for sleep. Some people get very hungry after taking it. Just watch your carbs and sugars and make sure you're going right to bed and not staying up eating. As far as being addictive, I find I'm dependent on it to sleep. I've tried other meds to sleep but I'll wake up a few hours later or not sleep at all.