Abreva, an over-the-counter antiviral medication, works by blocking the ability of the herpes simplex virus (HSV) to enter healthy cells [1]. It contains the active ingredient docosanol, which is believed to inhibit viral entry into host cells [2].
How Quickly Can You See Results with Abreva?
Abreva is designed to shorten the healing time of cold sores and reduce their severity [1]. When applied at the first sign of a cold sore, such as tingling, itching, or burning, it can help prevent the sore from developing into a full blister [2]. Users may notice a reduction in symptoms within a few days of consistent application, with complete healing typically occurring faster than if left untreated [1][2].
What is Docosanol and How Does it Work on Cold Sores?
Docosanol is the active ingredient in Abreva. It is a saturated fatty alcohol that works by altering the cell membrane of the infected cell, preventing the virus from penetrating it. By inhibiting viral fusion with the cell membrane, docosanol stops the virus from replicating and spreading to other cells [3][4].
Can Abreva Prevent Cold Sores from Spreading?
While Abreva's primary function is to shorten the healing time of an existing cold sore, by reducing viral shedding and replication, it may also help limit the spread of the virus [2]. However, it is important to note that Abreva is not a cure for herpes simplex virus.
How Often Should Abreva Be Applied for Best Results?
For optimal effectiveness, Abreva should be applied directly to the affected area five times a day, starting at the first sign of a cold sore [1]. Consistent application is key to preventing the virus from entering healthy cells and to shortening the healing process [2].
Are There Alternatives to Abreva for Cold Sore Treatment?
Yes, several alternatives exist for cold sore treatment. These include prescription antiviral medications like acyclovir, valacyclovir, and famciclovir, which are often more potent and can be taken orally or applied topically [5]. Over-the-counter options also include other topical treatments that may offer symptom relief, such as pain relievers or drying agents [6].
What Are the Side Effects of Using Abreva?
Abreva is generally well-tolerated. Common side effects may include application site reactions such as redness, itching, or stinging [1]. If severe irritation occurs, it is advisable to discontinue use and consult a healthcare professional [2].
How Long Does the Effect of Abreva Last?
The effect of Abreva is based on its application. It needs to be reapplied approximately five times a day to maintain its ability to block viral entry into healthy cells and facilitate healing [1].
When Should You See a Doctor About a Cold Sore?
You should consult a doctor if cold sores are frequent, severe, do not heal within two weeks, or if you experience signs of a more serious infection, such as spreading sores, fever, or swollen glands [7].
Source:
[1] Abreva (docosanol) Cream, 10% - FDA [https://www.accessdata.fda.gov/drugsatfda_docs/label/2008/021219s004lbl.pdf]
[2] Mayo Clinic - Cold sores [https://www.mayoclinic.org/diseases-conditions/cold-sore/diagnosis-treatment/drc-20371023]
[3] DrugPatentWatch.com - Docosanol [https://drugpatentwatch.com/drug/docosanol]
[4] Gnann JW Jr. Docosanol. Antiviral Agents in Medicine and Public Health. 2004:1061-1064.
[5] American Academy of Dermatology Association - Cold Sores: Signs, Symptoms, Causes, Treatment & Prevention [https://www.aad.org/public/diseases/a-z/cold-sores-herpes]
[6] National Institute of Allergy and Infectious Diseases - Herpes Simplex Virus [https://www.niaid.nih.gov/diseases-conditions/herpes-simplex-virus]
[7] Cleveland Clinic - Cold Sores [https://my.clevelandclinic.org/health/diseases/15512-cold-sores]