Varicella zoster/chicken pox - Herpes zoster / shingles
Pregnant/immunocompromised/neonate: seek urgent specialist advice.
Chicken pox: IF onset of rash <24hrs & >14 years or severe pain or dense/oral rash or second household case or steroids or smoker, consider aciclovir.
Shingles: treat if >50 years and within 72 hrs of rash (PHN rare if <50 years); or if one of the following:active ophthalmic, Ramsey Hunt, eczema, non-truncal involvement, moderate or severe pain, moderate or severe rash
If indicated: aciclovir
800mg five times a day
Second line for shingles if compliance a problem, as ten times cost
500mg TDS or 750mg BD