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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Genital herpes is a highly contagious infection usually spread through intercourse with a person with infected sores, but it can be passed through oral or anal sex as well. It may also be spread even when sores are not visible.
Genital herpes can also be transmitted (spread) to a newborn during birth if the mother has an active infection.
What Causes Genital Herpes?
Usually, this infection is caused by the herpes simplex virus-2 (HSV-2) although herpes simplex virus-1 (HSV-1), the virus responsible for cold sores, may occasionally cause this disease. It can be spread by an infected partner who does not have any sores and may not even know they have the disease.
How Common Is Genital Herpes?
At least 45 million American adults and adolescents have genital herpes -- that's 1 out of every 4 to 5 people, making it one of the most common sexually transmitted diseases. Since the late 1970s, the number of Americans with genital herpes infection has increased 30%, mostly in teens and young adults.
Genital herpes is more common in women than in men.
How Do I Know If I Have Genital Herpes?
Most people infected with genital herpes have very minimal or no signs or symptoms of their disease. The first attack of herpes usually follows this course:
* Skin on or near the sex organ becomes inflamed. Skin may burn, itch or be painful.
* Blister-like sores appear on or near the sex organs.
* Sores open, scab over, and then heal.
Symptoms that may also be present when the virus first appears include:
* Swollen glands
* Fever
* Headache
* Burning when passing urine
* Muscle aches
The first outbreak of herpes can last for several weeks. After the outbreak, the virus retreats to the nervous system, where it remains inactive until something triggers it to become active again.
Typically, another outbreak can appear weeks or months after the first, but it almost always is less severe and shorter than the first episode. Although the infection can stay in the body indefinitely, the number of outbreaks tends to decrease over a period of years.
How Often Do Outbreaks Happen?
How often outbreaks occur depends on the person. On average, people with herpes experience about four outbreaks a year. The first outbreak usually is the most painful and takes the longest to heal. The pain and recovery time often decrease with each outbreak.
What Triggers an Outbreak?
It depends on the person. Some commonly reported triggers include:
* Stress
* Illness
* Surgery
* Vigorous sex
* Diet
* Monthly period
How Are Genital Herpes Diagnosed?
Your doctor can diagnose genital herpes by visual inspection if the outbreak is typical, and by taking a sample from the sore(s). But, HSV infections can be difficult to diagnose between outbreaks. Your doctor may check for ulcers internally -- on the cervix in women and the urethra in men. Blood tests that detect HSV-1 or HSV-2 infection may be helpful, although the results are not always easy to interpret.
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