Hello, i am suffering from shingles from a week now and few affected areas have started to cure while few has blisters on it. i did undergo 7 days valtrex and tylenol medication and now the doctor has advised me to start with postherpetic medicines. when

Shingles treatment: Although 7 days is often sufficient for valacyclovir (Valtrex) treatment of shingles, if new blisters are continuing to appear, treatment should be extended. Check with your doctor. Presumably the "postherptic" medicine is prednisone or other corticosteroid (?). That's the only kind of treatment normally used to minimize the nerve pain that can follow shingles (post-herpetic neuralgia).