I have been on 20 mg paxil for panic attacks for 7 years, I've tried to wean from paxil(felt like had no energy on paxil) many times, unsuccessfully. I've recently switched to 20 mg prozac, without a taper. After about 5 weeks, I started to feel lousey-nausea, diarrhea, no appetite, depressed. Still feeling lousey. Would it likely be better to increase prozac, or switch back to paxil. If switching back to paxil, what are the best ways to do this.