Wellbutrin and happiness

Day 21 on Welbutrin XL 150 mg. - prescribed to help stop (light) smoking habit & for depression. I loved it - smoking urges not nearly as strong, more energy, very few emotional outbursts & general sense of calm, happiness & well-being. I haven't felt this good for 4 years. Have tried other meds in past but quit due to weight gain & sexual side-effects. Yesterday I developed HIVES. Damn. Saw nurse practitioner today. She wants me to switch to Lexapro. Told me to start w/ 1/2 a tab @ bedtime tonight. AAaaarrrgh! Anyone have any experience w/ Lexapro?

This is the 3rd time I have been on Wellbutrin. Once in 1999, then in 2004, and just started taking it again 3 months ago. The first two times I took it I had joint pain and a lot of muscle inflammation. This go around is different... Just recently, within the past few weeks, I started breaking out with hives, after taking it with no problems for three months! Started on my head and progressively got worse. I break out all over my body, head, legs, back, hands, etc. For some reason it seems to happen more frequently when I lay down in my bed to go to sleep (weird!) One other scary side affect is, I frequently stop breathing when I start to fall asleep, and wake up gasping for air. Has anyone else experienced this?
Since I had never experienced problems with hives the first few times I was on Wellbutrin, I didn't think it was the medication causing the hives. So, I cut my dose in half (50mg/day). The hives didn't go away, so I stopped taking it all together 3 days ago, but still continue to get hives. Does anyone know how long it takes to get it out of your system?

I have been taking wellbutrin 150mg for 3 months and I have had absolutely positive results. I have a new sense of hope, happiness and enjoyment out of life. I am much more focused and I feel like it has really really helped me and made me happy again without feeling it is a fake happiness.

I Highly recommend it. I didn't notice results at first, it took about 6 weeks. I took 300mg for a short time but it gave me bad headaches so I went back to 150mg and I think its the perfect dose for me.