I'm taking 600 mg of lithium at night bedtime and taking 300 mg with 150 mg of Zoloft in the morning. I'm taking lithium as a augmentation because I'm tolerant of depression meds. I'm so fatigued and sleepy during the day were I have to sleep at least 4hours its terrible. Could it be the lithium or Zoloft? Could I take either med at a different time to help with my fatigue? Like all at night? It is working for my depression and anxiety so I don't want to change meds ny help is appreciated