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Abreva is an over-the-counter (OTC) medication used to treat cold sores, also known as fever blisters [1]. It is available in the United States and other countries [2]. The active ingredient in Abreva is docosanol 10% [1].
How does Abreva work?
Docosanol works by creating a barrier that blocks the virus that causes cold sores (herpes simplex virus type 1) from entering and spreading to healthy cells [1][3]. It is thought to inhibit the fusion of the viral envelope with the cell membrane [3]. Abreva is most effective when used at the first sign of a cold sore, such as tingling or itching [1].
When should I start using Abreva?
It is recommended to apply Abreva at the very first sign of a cold sore, such as tingling, itching, or burning [1]. Early application helps to shorten the healing time and reduce the severity of the outbreak [1][4].
How long does it take for Abreva to work?
When used as directed, Abreva can help shorten the healing time of a cold sore. Clinical studies have shown that it can shorten healing time by about one day compared to a placebo [1][4]. It is typically applied five times a day [1].
What are the ingredients in Abreva?
The active ingredient in Abreva is docosanol 10% [1]. Inactive ingredients include benzyl alcohol, emulsifying wax, light mineral oil, polyethylene glycol 1000 monostearate, propylene glycol, purified water, and stearyl alcohol [1].
Can Abreva be used by children?
Abreva is generally recommended for use in adults and children aged 12 and older. It is advisable to consult a doctor before using it on children younger than 12 [1].
What are the side effects of Abreva?
The most common side effects reported with Abreva include headache and application site reactions, such as redness, itching, or stinging [1]. These side effects are typically mild [1].
Where can I buy Abreva?
Abreva is available over-the-counter at most pharmacies, drug stores, and supermarkets [2].
What is the difference between Abreva and other cold sore treatments?
Abreva is a topical cream that uses docosanol to block viral entry into healthy cells [1][3]. Other cold sore treatments may have different active ingredients, such as acyclovir or penciclovir, which are antiviral medications that work by inhibiting viral DNA replication [5]. Some treatments may also focus on symptom relief, such as numbing agents [4].
Can Abreva prevent cold sores?
Abreva is designed to treat active cold sores by shortening healing time. It is not intended as a preventative medication to stop cold sores from forming altogether, although early application can help reduce the severity and duration of an outbreak [1][4].