Opiates and Body Jerks??

I was wondering if anyone had any input on these full body night jerks i am having. The medical term for what im expierencing is termed myoclonus. It is a sudden, and uncontrollable jerking of the limbs or body. I expierence this whenever i try to fall asleep on a plane or in a car. It seems anytime i take an opiate, in my case Oxycodone (percocet/roxicet), shortly before i lay down or try and fall asleep i experience these violent jerks. Id be  laying down relaxing and all of a sudden my leg kicks, and recently my whole body just jumped. These jerks are very scary and only happen when i take an opiate. Does anyone else experience what im expaining? What causes it? What does it mean?  Also, during the same time ( usually end of the night right before i try to fall asleep) I expierence sensitivity to sounds..If my phone rings, or a loud commercial comes on i jump. Feels like someone suddenly yells in my ear? Finally, when i close my eyes, and move my eyes around while they are closed i get this odd feeling. The feeling is very hard to explain, its not painful, and it almost feels good? This stuff is confusing and scaring the **** out of me! Please let me know if anyone hase experienced anything similar!

Thanks!

[tbirds]

I thought I was the only one that had these. It is a reation to the opoiates, Its werid to explain but its kinda like a sppedball works. start falling asleep and right before you hit the first stage of sleep, BAM it hit you. Sound famair? Im on Methadone 360mgs a day, for 3 years now, It took my body to adujust almost 2 years. I found out i should have seen a dr though, It could be very unlikly but it can be early seizures. Are you on the med for a reason are are you hooked? Be sade and see your dr, if you dont want to see your dr then go to the Er tell them you dont have a dr,so they wont call him. They willl ask where and why you are 0n the pills, nice thing about ER you can spew anything.

[NUATDIS]

OMG! these are the exact same symptoms exact exact thing that ive been going through it only used to happen at night but now when im relaxing on the couch they start also but not as much and also sometimes i find myself that when my body has a jerk i will make noise or yell out a little bit and i take ultram for pain so i was also very scared but im now a little okay because im not the only one going through this if u find out any more info about our syptoms (symptoms) please post it thanks.