Rofl... well I was on zero weed or anything else when I had the hallucinations.. if you don't usually get hallucinations from pot, and suddently do on lexapro then it's the lexapro causing it. I preferred lithium to lamictal, you could try that. And all the sleeping, probably caused by the risperdal right, and should wear off once you get used to it? I would think you could do without lexapro if you were on lithium. Lithium is supposed to be good for bp depression. I'm off it now, but it helped me at one time.