Efficacy and Safety Study of Propofol Infusion for Refractory Chronic Primary Insomnia

Inclusion Criteria: * Ambulatory, male or non-pregnant, non-lactating female, 18-65 years of age. * Overall healthy with no other sleep disorder such as sleep apnea or periodic limb movement disorder * Has not responded to conventional pharmacologic therapies (benzodiazepines and non-benzodiazepines) within the past 90 days. The non-benzodiazepine therapies can include melatonin and melatonin receptor agonists, antihistamines, antidepressants, over-the-counter medications, supplements or herbs for sleep * Have refractory chronic primary insomnia (chronic-inadequate quantity or quality of sleep characterized by a subjective report of difficulty with sleep initiation, duration, consolidation, or quality that occurs despite adequate opportunity for sleep, and results in some form of daytime impairment and has persisted for at least one month., primary-insomnia independent of any known physical or mental condition, refractory-not yielding, at least not yielding readily to treatment based upon polysomnography at baseline, total sleep time (sTST) of \< 6 hr, a subjective wake time after sleep onset (WASO) of \>1 hr, a subjective latency to sleep onset (SOL) of \> 20 min * Willing and able to give written informed consent * Clearly understands the procedures and requirements for the study * Willing and able to comply with all study procedures and data recording obligations for the entire length of the study * Have no clinically significant abnormalities on the basis of medical history, physical examination and vital signs in the judgment of the investigator and/or sub-investigator * Ability and willingness to abstain from any pharmaceutical or over-the-counter medication for sleep as well as alcohol from 72 hours prior to baseline and the first dose until after completion of the Study Product Administration Follow-Up Visit (Day 6) as well as 72 hours prior to the Day 90 visit. * All values for hematology and for clinical chemistry tests of blood within the normal range for age and gender or showing no clinically relevant deviations as judged by the investigator * Nonsmoking or have quit smoking at least 6 months prior to dosing Exclusion Criteria: * Having any medical conditions including diabetes, cardiovascular disease, pulmonary, renal, endocrine, hepatic, neurologic, psychiatric (including depression), immunologic, hematologic, gastrointestinal or metabolic disease requiring medical treatment that would preclude participation into the study in the judgment of the investigator/sub-investigator * Having ingested any pharmaceutical or over-the-counter sleep product within 72 hours of dosing as well as 72 hours prior to the Day 90 visit. * Taking any medication that can yield a moderate to major drug interaction with propofol including those with CNS (central nervous system)-depressant effects * Having had a history of any medical or surgical procedure that would preclude participation into the study in the judgment of the investigator/sub-investigator * Being pregnant, planning on becoming pregnant, breast feeding or unwilling to use a medically acceptable form of birth control during the study (with at least one acceptable barrier for a period of one month prior to the beginning of the study until at least three months after study completion) or are surgically sterile or postmenopausal (at least 12 months without a period). * Having a systolic blood pressure \>160 mmHg, diastolic blood pressure \>90 mmHg, or blood pressure that would preclude participation in the judgment of the investigator/sub-investigator * Having a previous history of abnormal screening laboratory test values: bilirubin \> 2 x ULN (upper limit of normal), AST(aspartate aminotransferase) and ALT (alanine aminotransferase) \> 2 x ULN (upper limit of normal), serum creatinine \> 1.5 mg/dl, fasting blood glucose below 85mg/dl or above 110 mg/dl, calcium level \< 8.6 mg/dl and triglycerides \>200.0mg/dl. * Any type of active malignancy (except non-melanomatous skin malignancies) within the past 5 years * History of known or suspected substance abuse * Currently consume more than 7 standard alcoholic drinks per week and unable to refrain from consuming an alcoholic beverage during the course of the study dosing period. * Currently consume more than 14 caffeinated beverages per week and unable to refrain from consuming a caffeinated beverage within 8 hours prior to dosing. * History of allergy to any anesthetic, eggs, egg products, soybeans or soy products as well as hypersensitivity to Propofol or any of its components * Unable to avoid engaging in a hazardous occupation requiring complete mental alertness and/or motor coordination after receiving the study product. * Participation in another study within 30 days prior to dosing. * Donated blood within 30 days prior to dosing. * Illness within five days prior to dosing * Having a pacemaker or any internal medical device * In the opinion of the investigator, not suitable for entry into the study.