I think anything you're body does like shaking, tremoring etc just assists the body in reving up the anxiety. I think that's what they were refering to. That physically stopping the tremoring can possibly stop the anxiety/panic attack or prevent it from getting worse.
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Medications:
Venlafaxine (Effexor) 75mg daily
Divalproex (Valproic Acid) 600mg daily
Seroquel (Quetiapine) 100mg daily
ZMAN