welcome to healthcaremagic
on analysing the symptoms and the problems which you have described, the best possible measure that can be offered is already being given to you.
regarding the residual post herpetic neuralgia
which can persist depends an a number of factors starting from age, sex, to associated systemic illnesses.
with early institution of therapy as in your case the risk of residual pain diminishes substantially
1 gram 4 times a day should be adequate enough
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