Hello. I am trying to help my son who has rapid-cycling bipolar illness. He has been stable for several years but now having exacerbation. I am giving him inositol and fish oil, but I do not know what dose inositol to use. 500 mg twice a day for about 1 week but no benefit for severe insomnia, 8 hours sleep in 3 days. No suicidality of which I am aware at this time. Feelings of wasted life, purposelessness. Depression. Thank you for any help you can give.