Dear Barbara, Hi Sandy here in North Carolina. I have had pd for 20 yrs. I had early-onset at age 20. I have been on Liquid Sinemet now for going on 5 yrs. I am on Sinemet 24/7/365. I experience insomnia quite often. When it gets so severe I take Ambien. Fortunately even as a chile I never required much sleep. I do not nap. I try to cut out all caffeine past 7:00 pm. I really don't have good news for you. My body cannot go without sinemet anymore. I do know you are struggling and wish to tell you are not alone. I will be thinking positive thoughts and praying for you. Ambien has little side effects. No hangover next day. Ambien requires you to go directly to bed after taking. Good luck. Please keep us informed. Sandy Norris 40/28/20 "Faith is the daring of the soul to go farther than it can see."