What Are Cold Sores?

Cold sores, sometimes called fever blisters, are small blisters that appear periodically.¹ These blisters can itch and burn, and can be especially painful when they break open. Cold sores are also contagious, and can take up to two weeks to heal.

Where do cold sores commonly form?

Cold sore outbreaks typically occur on the face and lips, which is arguably the worst thing about them.¹ After all, who wants to sit through class, give a presentation, or go on a date with a cold sore on their lip? For this reason, cold sore sufferers often look for treatment options to help minimize the number of outbreaks they have to deal with, and/or to shorten the healing process.


Additional resources:


  1. WedMD (June 04, 2014). Cold Sores – Topic Overview [Skin Problems & Treatments Health Center web post]. Retrieved August 15, 2015, from http://www.webmd.com/skin-problems-and-treatments/tc/cold-sores-topic-overview
Indication & Important Safety Information
Sitavig® (acyclovir), 50mg Muco-Adhesive Buccal Tablet is indicated for the treatment of recurrent herpes labialis (cold sores) in immunocompetent adults.
  • Sitavig should not be used in patients with known hypersensitivity to acyclovir, milk protein concentrate, or other components of the product.
  • Sitavig has not been studied in pregnant women or in immunocompromised patients and no interaction studies have been performed. Sitavig’s safety and efficacy have not been established in pediatric patients.
  • Sitavig is a Pregnancy Category B product; therefore it should be used during pregnancy only if the potential benefit outweighs the potential risk to the fetus. It is not known if Sitavig is excreted in breast milk; however, systemic absorption is minimal.
  • In a controlled clinical trial Sitavig's most common side effects (greater than or equal to 1%) were: headache (3%), dizziness (1%), lethargy (1%), gingival (gum) pain (1%), aphthous stomatitis (canker sores) (1%), application site pain (1%), application site irritation (1%), erythema (1%) and rash (1%). In the same trial these side effects ranged from 0%-3% for placebo.
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch.com or call 1-800-FDA-1088. Click here for Full Prescribing Information.