Nuvigil Question: I just started taking this for excessive sleepiness & possible daytime narcolepsy. I am on the middle strength. It definitely is helping give me that edge to stay alert but shortly after taking I began to get knots/tightness in my neck/shoulder muscles & my lower back. I've noticed this before too with any type of stimulant I take even if I have too much coffee. Is this normal & will it go away or should I try either cutting the tab in 1/2 or the lower dosage? I already see a Chiropractor & am constantly stretching out because I carry all my tension in my neck & back so that's the last thing I need more of! Thanks for any input on this