Adderall and Insomnia

Lethargic Lady

If regular release Adderall is only supposed to work for 4 to 6 hours then why would it give me insomnia? It seems to me that it builds up in your system since the insomnia gets worse the longer I stick with it. I'm down to 10mg a day and even if I only take it first thing in the morning I can still only sleep five hours at best. And it is not a deep sleep. I wake up multiple times during the night. I've had insomnia before but nothing like this. Taking Lunesta sleep-aid helps me fall asleep but it certainly doesn't keep me asleep. I also take Lamictal for depression at bedtime but that should help me sleep if anything. So I guess my question is whether anyone else thinks the six hour expiration is bull? Seems like most people have the opposite issue with it not lasting long enough. Also, if I switch to a different ADHD med am I going to have the same problem. They're all pretty similar aren't they?