I have had Postherpetic Neuralgia for a few months and feel shaky, nervous and depressed... I don't want to take tranquilizers as I am a heart patient with a defibrillator, a metal valve and have been on Coumadin for 17 years... Please help me and tell me if you also feel the shakiness and uncomfortable feeling as I do... Currently I am on no medication for PHN... I had two shots, done at separate times, injected into my back to relieve the itching and pain and they were of no value...