I was on 20 mg. of prozac for 20 plus years, whenever I'd have an anxiety relapse I'd go up to 40 along with something to sleep and a short course of benzos and therapy. 4 months ago I had a major relapse and my GP decided prozac was the cause of my anxiety and I should switch. Reluctantly a month later the psychiatrist who had not touched the prozac dosage switched my to Celexa. I spent a summer of hell on celexa and wound up with a different psychiatrist. After giving the celexa a fair shot of 11 weeks 5 weeks at 40 mg. He changed me back to prozac. Just finished 2nd week of prozac, got back genetic tests that said prozac is more effective for me than celxa (no surprise) and now he wants me to double up to 40. So freaked out by such a quick increase. I have klonopin up to 2mg a day for the switch and ambien for sleep, but I am so stressed out. Need some encouragement.