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- What is nevirapine, and how does it work (mechanism of action)?
- What is nevirapine used for?
- What are the side effects of nevirapine?
- What is the dosage for nevirapine?
- What drugs or supplements interact with nevirapine?
- Is nevirapine safe to take if I'm pregnant or breastfeeding?
- What else should I know about nevirapine?
What is nevirapine, and how does it work (mechanism of action)?
Nevirapine is an oral medication that is used for the treatment of infections with the human immunodeficiency virus (HIV). It is in a class of drugs called reverse transcriptase inhibitors that also includes zalcitabine (Hivid), zidovudine (Retrovir), didanosine (Videx), and lamivudine (Epivir). It is in a subclass of protease inhibitors called nonnucleoside protease inhibitors that includes efavirenz (Sustiva) and delavirdine (Rescriptor). During infection with HIV, the HIV virus multiplies within the body's cells. The newly-formed viruses then are released from the cells and spread throughout the body where they infect other cells. In this manner, the infection spreads to new, uninfected cells that the body is continually producing, and HIV infection is perpetuated. When producing new viruses, the HIV virus must manufacture new DNA for each virus. Reverse transcriptase is the enzyme that the virus uses to form this new DNA. Nevirapine directly inhibits the activity of reverse transcriptase and blocks the production of DNA and new viruses. Nevirapine does not kill existing HIV virus and it is not a cure for HIV. The FDA approved nevirapine in September 1996.
What brand names are available for nevirapine?
Viramune, Viramune XR
Is nevirapine available as a generic drug?
GENERIC AVAILABLE: Yes
Do I need a prescription for nevirapine?
Yes
What are the side effects of nevirapine?
The most common side effects of nevirapine are:
The most serious side effects of nevirapine are:
- liver failure,
- severe skin reactions,
- decreased white blood cells, and
- muscle breakdown (rhabdomyolysis).
Like other antiretroviral drugs, use of nevirapine is associated with redistribution or accumulation of body fat. Immune reconstitution syndrome which is an inflammatory response to infection may occur in patients treated with combination anti-HIV therapy.
What is the dosage for nevirapine?
The starting dose for adults is 200 mg daily (lead-in period). After 14 days the dose should be increased to 200 mg every 12 hours or 400 mg of extended release once daily. The 14 day lead-in period must be observed in order to reduce the incidence of rash, and it should not be longer than 28 days. Any patient who develops a rash during the lead-in period should not receive twice daily treatment or extended release tablets until the rash has resolved. Nevirapine must be administered in combination with other anti-HIV drugs because the HIV virus quickly becomes resistant nevirapine when it is used alone. Nevirapine may be administered without regard to meals since food does not reduce its absorption.

QUESTION
What is HIV? See AnswerWhat drugs or supplements interact with nevirapine?
Many drugs can interact with nevirapine, or make it less effective. Not all possible interactions are listed here.
Avoid drinking alcohol, which may increase your risk of liver damage.
Tell your doctor about all your current medicines and any you start or stop using, especially:
- antiviral medication to treat hepatitis C;
- antibiotics or antifungal medicine;
- birth control pills;
- blood thinners (warfarin and others);
- ergot medicine (dihydroergotamine, ergonovine, and others);
- heart or blood pressure medication;
- medicine to prevent organ transplant rejection; or
- seizure medication.
This list is not complete, and many other drugs can interact with nevirapine. Give a list of all your medicines to any health care professional who treats you. This includes prescription and over-the-counter medicines, vitamins, and herbal products.
Is nevirapine safe to take if I'm pregnant or breastfeeding?
Nevirapine is excreted in human breast milk. Nursing should be discontinued during nevirapine therapy. In addition, HIV infected mothers should not nurse because of the risk of transmitting HIV to an infant that is not infected.
What else should I know about nevirapine?
What preparations of nevirapine are available?
Tablets: 200 mg; Suspension: 10 mg/ml. Tablets (extended release): 400 mg.
How should I keep nevirapine stored?
Tablets and suspension should be stored at room temperature, 15 C to 30 C (59 F to 86 F).
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Summary
Nevirapine (Viramune, Viramune XR) is a drug used in conjunction with other anti-HIV drugs for the treatment of HIV infection. Review side effects, dosage, drug interactions, pregnancy safety, and warnings and precautions prior to taking this medication.
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Human Immunodeficiency Virus (HIV)
HIV (human immunodeficiency virus) infection left untreated causes AIDS (acquired immunodeficiency syndrome). The human immunodeficiency virus (HIV) is a type of virus called a retrovirus, which can infect humans when it comes in contact with tissues that line the vagina, anal area, mouth, or eyes, or through a break in the skin. HIV infection is generally a slowly progressive disease in which the virus is present throughout the body at all stages of the disease. Three stages of HIV infection have been described. The initial stage of infection (primary infection), which occurs within weeks of acquiring the virus, often is characterized by the flu- or mono-like illness that generally resolves within weeks. The stage of chronic asymptomatic infection (meaning a long duration of infection without symptoms) lasts an average of eight to 10 years without treatment. The stage of symptomatic infection, in which the body's immune (or defense) system has been suppressed and complications have developed, is called the acquired immunodeficiency syndrome (AIDS). The symptoms are caused by the complications of AIDS, which include one or more unusual infections or cancers, severe loss of weight, and intellectual deterioration (called dementia). When HIV grows (that is, by reproducing itself), it acquires the ability to change (mutate) its own structure. These mutations enable the virus to become resistant to previously effective drug therapy. The goals of drug therapy are to prevent damage to the immune system by the HIV virus and to halt or delay the progress of the infection to symptomatic disease. Therapy for HIV includes combinations of drugs that decrease the growth of the virus to such an extent that the treatment prevents or markedly delays the development of viral resistance to the drugs. The best combination of drugs for HIV are those that effectively suppress viral replication in the blood and also are well tolerated and simple to take so that people can take the medications consistently without missing doses.
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