(((freespirit37))) Lack of energy is a symptom of anxiety and depression. It must be exhausting to deal with anxiety for prolonged periods of time. I'm glad you could get some rest. Perhaps you need your prescribing doctor to adjust your Vistaril dosage or change it. One of the adverse effects of this drug is agitation. Are you experiencing agitation with your anxiety. Do you think the Vistaril is working for you?