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This is Dr. David
I would not start giving him your narcotic medicaitons
he should go see a doctor about his shingles
he could have an infection on top of his shingles infection
he might need an antibiotic if he also has a bacterial infection
his doctor can also prescribe to him pain pills and lidocaine creams to help decrease pain.
that is good he is on Famvir.
who started him on Famvir?
his doctor who diagnosed him 3 days ago should have given him a course of pain medications for him