Looking for encouragement and advice for 87 year old father who is at the 6 month mark for PHN in area of left scalp, above left brow and in left eye. He also has generalized myasthenia gravis which was very much under control until docs added immunosuppressive drugs to his regimen and in spite of receiving the shingles vaccine a few years back developed the shingles and subsequent PHN. Tried Gaba,Lyrica,Cymbalta but did not tolerate these oral meds well because of the MG. He has been using the cold compresses from the start, but it is only a bit of relief. The pain and extreme itching, particularly above the left eye are unbearable. He sometime takes a half of a narcotic pain pill, which I'm not sure really helps. He has the 5% lidoderm patches which he has not given a consistent trial. Is it worth trying nortriptyline? I am leaning more toward topical treatments from a safety standpoint. It is so heartbreaking to see him go from a totally active lifestyle to being home bound and suffering for 6 months. Will appreciate any and all suggestions.