Not for herpes: Bactroban (mupirocin) is an antibiotic , works well against most staph and strep; doesn't work against viruses. Often blisters on lip are from herpes infection (cold sore); Mupirocin won't work on those; most of those do not become secondarily infected with bacteria; if it does, then Mupirocin may help.
Answered 6/30/2014
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