My doc started me on 150mg x 1/day for three days, then 150mg x 2/day for five days, then blood test. the blood test showed negligible seum Li, so I upped it to 150 x 3/day last Friday. Over the weekend, I felt depressed. I can't say for sure it was the Li, but I was despondant, my hands and neck so very stiff and I just felt useless, incapacitated and didn't see much point in going on. I drank a bottle of wine and went to bed. This morning, I still felt bad physcally, but my spirits were MUCH better. The weather was nice so I went out and exercised. Now I feel terrific! Nobody has listed "depression" as a symptom on the spreadsheet, but I feel like my brief depression may have been a reaction to upping the dosage. I'd ask your Dr about cutting back to 150mg for a few days, then going back to 300mg so that you can better adjust.