Prime Health's Liver Flush (sensiblehealth.com) includes four tinctures to prepare for each flush. Two of them are taken at bedtime precisely to help you fall asleep. One of them, Curcuma, is based on Turmeric, which is a blood thinner...the other, Coptis is a bitter solution to trigger bile release from the liver, and it can make you very sleepy, almost immediately. It's a Canadian site, shipping prices are higher. The Liver Flush itself aims to reduce the congestion in the liver so that the sleeping problems diminish in time, since liver congestion is the main cause according to the site. Of course, the Liver Flush can be done without having to use these Chinese tinctures, but at least the two mentioned would seem very indicated in this case. These were the products used by the site founder to heal herself. Anyhow Turmeric supplements are available elsewhere and the other herbs can also be purchased locally if you're interested.