Cold sores are small, often painful blisters that usually show up on, or around, the lips. However, while the lips are the most common area cold sores appear, they can also show up on other places of your face. Some of these places include your1:

  • Nose
  • Cheeks
  • Face

If a cold sore appears, take extra caution in your daily routine to protect the new skin as it develops — especially if it’s your first cold sore. 90% of all people get at least one cold sore in their lifetime, and the first occurrence is often the worst1.


  1. WebMD. (March 13, 2015). Understanding Cold Sores – the Basics. Retrieved March 16, 2016 from
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 or call 1-800-FDA-1088.

Click here for Full Prescribing Information.