I am 19 I have always suffered anxiety but it was now unbearable. I couldn't get any sleep and was barely eating. I am now taking paxil 20 mg a day and I am worried this will cause a weight gain. I have always been a fit healthy girl. I eat well and exercise daily. I am hoping there is a way around the usual weight gain side effect or if I can do certain things to avoid it. If i don't increase my calorie intake will i still gain weight? Thank you so much to anyone who answers I am a little scared now.