How is Herpes treated?

Herpes cannot be cured. Once either virus is inside the body and settles itself into the nerve cells, it cannot be eliminated. However, herpes sores can be treated. Treatment can speed up healing time, reduce pain, and delay or prevent additional flare ups. Typically, treatment is used only during a flare up. This is called "episodic therapy." In people with compromised immune systems, flare-ups can be frequent and may require long-term therapy to prevent recurrences. This is called "suppressive therapy." Some people can tell when they are about to have a flare up, usually because of tingling at the site where a sore will appear. This is called the "prodrome" stage.

There are four treatments available for the treatment of herpes:

• Acyclovir (Zovirax): Acyclovir has been studied and used for many years as a treatment for oral and genital herpes. It has been studied specifically in people with HIV and herpes and has been shown to be safe and effective. Acyclovir is available in a topical cream, pills, and an intravenous formulation. Most experts agree that the cream is not very effective and that pills are best for mild to moderate flare-ups or long-term suppressive therapy. Intravenous acyclovir is used to treat serious flare-ups or outbreaks that effect internal organs (especially HSV infection of the central nervous system). The oral dose used to treat flare-ups is 400 mg taken either three or four times a day, usually for five to ten days. Treatment will work best if it is started within 24 hours of the first sign of symptoms or the prodrome stage. For this reason, people with more frequent outbreaks not on suppressive therapy may wish to keep acyclovir on hand in case of a flare up. The dose can be doubled if the herpes sores fail to respond. Taking 400 mg of the drug three-times daily or 800 mg of the drug twice a day for a prolonged period of time can help prevent flare-ups from recurring. However, this is usually recommended only for patients who have a history of frequent recurrences.

• Valacyclovir (Valtrex): Valacyclovir is a "pro-drug" of acyclovir and has been approved specifically for the treatment of herpes in HIV-positive people. Unlike acyclovir, valacyclovir needs to be broken down by the body before its active ingredient— acyclovir—can begin controlling the disease. This allows for higher amounts of acyclovir to remain in the body, thus requiring a lower dose of the drug to be taken by mouth. For mild to moderate herpes flare ups the dose of valacyclovir in people with HIV is 500 mg twice daily. For episodic therapy, valacyclovir is taken for five to ten days. However, the drug can be taken every day for a prolonged period of time using half the dose needed to treat flare-ups (500 mg every day). Treatment will work best if it is started within 24 hours of the first sign of symptoms or the prodrome stage. For this reason, people with more frequent outbreaks not on suppressive therapy may wish to keep valacyclovir on hand in case of a flare up. Like acyclovir, valacyclovir rarely causes side effects.

• Famciclovir (Famvir): Famciclovir is the pill form of a topical cream called penciclovir (Denavir). Usually, 500 mg of the drug is taken by mouth, twice daily, for five to ten days. Treatment will work best if it is started within 24 hours of the first sign of symptoms or the prodrome stage. A dose of 500 mg twice daily, taken for a prolonged period of time, is considered to be a safe and effective preventative therapy for recurrent herpes flare-ups.

• Trifluridine (Viroptic):Trifluridine drops are used to treat HSV infection of the eye(s). One drop is placed in the affected eye, every two hours, for up to 21 days. It cannot be used to treat or prevent HSV disease of other parts of the body.

In some cases, herpes flare-ups do not respond to acyclovir, valacyclovir, or famciclovir, probably due to the emergence of drug-resistant forms of HSV-1 and HSV-2. HIV-positive patients with suppressed immune systems —usually a CD4 cell count less that 100—who have been receiving long-term acyclovir for the treatment and prevention of recurrent herpes flare-ups have been known to develop drug-resistant herpes. Because acyclovir is similar to both valacyclovir and famciclovir, simply switching to these two drugs is not usually effective.

At the present time, foscarnet (Foscavir) is the most common treatment for acyclovir-resistant herpes. The drug must be administered via an intravenous (IV) line, usually three times a day, often in a hospital or under the close supervision of an in-home nurse.

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