Volunteers for this study will complete paper and pencil questionnaires about their symptoms as well as a computerized test to assess their degree of brain fog. They will then be randomly assigned to one of two groups, placebo or drug. Volunteers will not know what group they are in until the end of the study. Only the drug group will receive the medication. The placebo group will receive a substance that looks identical to the real medicine but with no active ingredients. The medication comes as a liquid and patients will start taking an initial dose about 30 min before they expect to sleep. If subjects awaken after less than 5 hrs of sleep, they will take a second dose. If they sleep more than 5 hrs, they will be told to skip taking the second dose. We will call patients weekly to see how they are doing on the "drug." If they have tolerable side effects or report significant improvement, we will maintain the dose. But if patients report no effect of treatment, the dosage will be incremented by 1 ml per week until good sleep is achieved or a predetermined maximum is reached.