IMHO since it was upon awakening, I would think u might have slept on it wrong. If it would continue to happen at other times, I might get it checked out, but I think you probably just slept on it wrong - really.

As for having brief weak moments - sure - even those without anxiety can as well, but for us anxiety people, improper breathing will cause not only the weakness, but the tingling sensations in the extremities and lips, not enough oxygen. The breathing techniques work wonders on many of the symptoms of anxiety.

Dont know much about Vistraril and its side effects, but I have been on benzo's for 15 years and had NO visual disturbance - but we are all different and meds affect us all differently. Curious - why do you take benzo's from time to time?

Like MissHoney asked - are you in therapy of any kind for your anxiety issues?