Drug Uses
Famvir is an oral antiviral prescription medication that is prescribed for: treatment of recurrent genital herpes in otherwise healthy patients; suppression of recurrent genital herpes in otherwise healthy patients; treatment of recurrent herpes simplex virus infections (genital herpes and cold sores) in HIV-infected patients and herpes zoster (shingles).
How Taken
Famvir can be prescribed in one of three ways:
-Episodic treatment: your doctor treats an outbreak of genital herpes as it occurs. The usual dose of Famvir is one 125-mg pill, twice a day, for 5 days.
-Suppressive treatment: if you have frequent or severe outbreaks, you take one 250-mg pill, twice a day, for up to 1 year to suppress the genital herpes virus and help to prevent outbreaks.
-Patients with HIV: Famvir is the only prescription oral antiviral therapy indicated for treating genital. In patients with herpes simplex and HIV, the dose of Famvir is 500 mg, twice a day, for 7 days.
Famvir can be taken with or without food.
Warnings/Precautions
Do not take Famvir if you are allergic to penciclovir (Denavir) without first talking to your doctor. Before taking this medication, tell your doctor if you have kidney disease. You may need a dosage adjustment or special monitoring during treatment with Famvir.
Famvir (Pregnancy Category B) should be used during pregnancy only if the benefit to the patient clearly exceeds the risk to the fetus.
Missed Dose
IF YOU MISS A DOSE OF THIS MEDICINE, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do NOT take 2 doses at once.
Possible Side Effects
Stop taking Famvir and seek emergency medical attention if you experience an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives). Other, less serious side effects may be more likely to occur. Continue to take Famvir and talk to your doctor if you experience nausea or vomiting, a headache, diarrhea, dizziness, tingling in your hands or feet, or itching.
Storage
Store between 15C and 30C (59F and 86F) and out of reach of children.
Overdose
Seek emergency medical attention. A Famvir overdose has no known symptoms, but an overdose of acyclovir (Zovirax), which is a similar drug, may cause seizures, hallucinations, and kidney damage (decreased urine production).
More Information
Treatment with Famvir should be started as soon as possible after the first appearance of symptoms (e.g. tingling, burning, blisters). Take all of the Famvir that has been prescribed for you even if you begin to feel better. Your symptoms may start to improve before the infection is completely treated. Herpes infections are contagious and you can infect other people, even during treatment. Avoid letting infected areas come into contact with other people. Wash your hands frequently to prevent transmission. For more information, talk to your doctor, pharmacist or health care provider.
Disclaimer
This drug information is for your information purposes only, it is not intended that this information covers all uses, directions, drug interactions, precautions, or adverse effects of your medication. This is only general information, and should not be relied on for any purpose. It should not be construed as containing specific instructions for any particular patient. We disclaim all responsibility for the accuracy and reliability of this information, and/or any consequences arising from the use of this information, including damage or adverse consequences to persons or property, however such damages or consequences arise. No warranty, either expressed or implied, is made in regards to this information.
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Diagnosing Genital Herpes
A doctor can identify genital herpes by taking cells from the surface of the sores and looking at them under the microscope. The cells can be sent off for lab tests to confirm the diagnosis.
It can also be confirmed by a blood test that checks for antibodies.
Treating and Preventing Genital Herpes
There's no cure yet for genital herpes. Antiviral medications, such as acyclovir, famciclovir, or valacyclovir,* can reduce the severity and duration of symptoms. Treatment should be started as soon as possible and is most effective when started within the first 24 hours of the onset of symptoms.
Acyclovir, famciclovir, and valacyclovir are available as tablets. Acyclovir also comes in a cream or ointment. Antiviral medications can also be used on a daily basis to prevent breakouts of genital herpes. This treatment, also referred to as suppressive therapy, is usually reserved for people who experience more frequent flare-ups. Valacyclovir has also been shown to reduce the risk of transmission (passing on herpes to a sex partner).
It is best to avoid any cream or ointment that doesn't contain a specific antiherpes medication. This includes any preparation containing cortisone or antibiotics. These creams or ointments will not help and in some cases may make things worse. Using rubbing alcohol will only sting - and that's about all. If you are experiencing a lot of pain or discomfort, your doctor may prescribe an appropriate painkiller.
Other measures people can take to ease a breakout include:
* using bath salts and cold compresses
* keeping the infected area clean and dry
* wearing loose clothing and cotton underwear
It's important to make sure that the infection doesn't spread to other parts of the body. One of the more dangerous areas to spread the herpes virus to is the cornea of the eye. This can lead to blindness. Therefore, it is important for people with genital herpes to wash their hands thoroughly after touching sores or blisters and to use clean towels every time they wash - and not to reuse or share them. Genital herpes is not spread by toilet seats, bathtubs, swimming pools, or hot tubs.
There are a few things you can do to reduce your risk of catching herpes. People with genital herpes should inform their sexual partner(s) that they have the condition, and take appropriate precautions. Condoms can help reduce the risk of spreading genital herpes. During oral sex, the risk of genital herpes may be reduced by wearing a condom on the penis, or using a condom cut length-wise or a dental dam over the female genital area. It's important to know that condoms and dental dams do not always provide complete protection from herpes because they do not always cover all affected areas of the skin.
The medication valacyclovir can also help reduce the risk of herpes transmission. It should be used in combination with safer sex practices such as condoms and dental dams.
People with herpes should avoid sex when there are visible sores or use a condom or dental dam every time they have sex. They should also check with their doctor to see whether using medication to reduce the risk of transmission would be an appropriate option for them.
If the first episode of herpes occurs during pregnancy, a woman should see her doctor right away to discuss the steps she should take to reduce the risk of passing herpes on to her baby.
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