Botulinum Toxin A for Herpes Labialis

Botox® is supplied in a 100 U vial and will be reconstituted with 3.3 mL of 0.9% Sodium Chloride Injection USP to yield a solution of 3 U per 0.1 mL. Study treatment will consist of an injection of Botox® (onabotulinumtoxinA) (3 U/ 0.1 mL) into the orbicularis oris muscle (8 U, .27 mL in the upper and/or lower lip, depending on the site of recurrence) using a 30G needle.

Study treatment will consist of an injection of bacteriostatic normal saline, into the orbicularis oris muscle (8 U, .27 mL in the upper and/or lower lip, depending on the site of recurrence) using a 30G needle.