Benzalkonium + Benzocaine oral prep
Indications
Benzalkonium + Benzocaine oral prep is used for: 
 Cold Sores
                                              
                        Adult Dose
Cold Sores
Apply single dose topically to cold sore
                                              
                        Child Dose
Cold Sores
<2 years: Safety and efficacy not established
(>2 years): Apply single dose topically to cold sore
                                              
                        Renal Dose
Administration
Clean lip area using only warm water or alcohol of any lip preparations, lotions, ointments, residual beverages, or cosmetics, including lipstick
Follow directions on applicator to allow medication to saturate the tip
Gently touch the site of the cold sore with the saturated applicator tip; once the area is numb, rub the site of the cold sore and the surrounding area
Rub firmly to allow the treatment to deeply penetrate the skin
To treat most cold sores, 1 treatment is typically enough, if symptoms go away and then return, apply another dose for the second cold sore
Do not exceed >3 applications/day
Discard after use
                                              
                        Contra Indications
Hypersensitivity
                                              
                        Precautions
For external use only
Flammable, keep away from fire or flame
Stop and contact dentist or physician is symptoms persist >7 days
Ingredients in toothpaste, soft drinks, and some fruit juices can deactivate active ingredient
                                              
                        Pregnancy-Lactation
Pregnancy Category: C
Lactation: Unknown whether distributed in breast milk
                                              
                        Interactions
Side Effects
Side effects of Benzalkonium + Benzocaine oral prep : 
 Frequency Not Defined
Temporary stinging at application site
                                              
                        Mode of Action
Benzalkonium chloride: Topical antiseptic
Benzocaine: Topical anesthetic; decreases the neuronal membrane's permeability to sodium ions, which inhibits depolarization and subsequently blocks conduction of nerve impulses
Also contains 70% isopropyl alcohol