This is Dr. David
Grisovin is an oral antifungal used to treat ringworm and won't help
pain from shingles can be helped by nerve pain medications like neurontin (gabapentin) or lyrica (pregabalin). these are prescription medications and your doctor can start you on it.
also lidocaine cream 3% and lidocaine ointment 5% on the area of your prior rash can help.
acyclovir antiviral ointment can also help kill virus and help the rest of the rash to get better.
let me know if you have other questions.
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