Generic Name: nelfinavir (nel FIN a veer)
Brand Names: Viracept
What is Viracept?
Viracept (nelfinavir) is an antiviral medicine that prevents human immunodeficiency virus (HIV) cells from multiplying in your body.
Viracept is used to treat HIV, the virus that can cause cause acquired immunodeficiency syndrome (AIDS).
Viracept is not a cure for HIV or AIDS.
You should not use Viracept if you have moderate to severe liver disease.
Life-threatening side effects may occur if you take Viracept with alfuzosin (Uroxatral), amiodarone (Cordarone, Pacerone), lovastatin (Mevacor, Altoprev, Advicor), midazolam (Versed), quinidine (Quin-G), pimozide (Orap), rifampin (Rifadin, Rimactane, Rifater), sildenafil (Revatio for pulmonary arterial hypertension), simvastatin (Zocor, Simcor, Vytorin, Juvisync), St. John's wort, triazolam (Halcion), or an ergot medicine such as Ergomar, Ergotrate, Cafergot, Wigraine, D.H.E. 45, Migranal, or Methergine.
Taking Viracept will not prevent you from passing HIV to other people. Do not have unprotected sex or share razors or toothbrushes. Talk with your doctor about safe ways to prevent HIV transmission during sex. Sharing drug or medicine needles is never safe, even for a healthy person.
Before taking this medicine
You should not take Viracept if you are allergic to nelfinavir, or if you have moderate or severe liver disease.
Some medicines can cause unwanted or dangerous effects when used with Viracept. Your doctor may need to change your treatment plan if you use any of the following drugs:
sildenafil (Revatio for pulmonary arterial hypertension);
St. John's wort;
lovastatin or simvastatin;
dihydroergotamine, ergotamine, ergonovine, or methylergonovine;
amiodarone or quinidine; or
oral midazolam, or triazolam.
To make sure Viracept is safe for you, tell your doctor if you have:
a bleeding disorder such as hemophilia; or
high cholesterol or triglycerides.
Viracept is not expected to be harmful to an unborn baby, but HIV can be passed to your baby if you are not properly treated during pregnancy. Tell your doctor if you are pregnant or plan to become pregnant. Take all of your HIV medicines as directed to control your infection.
If you are pregnant, your name may be listed on a pregnancy registry. This is to track the outcome of the pregnancy and to evaluate any effects of Viracept on the baby.
Viracept can make birth control pills less effective. Ask your doctor about using non hormonal birth control (condom, diaphragm with spermicide) to prevent pregnancy.
You should not breast-feed while you are using Viracept. Women with HIV or AIDS should not breast-feed at all. Even if your baby is born without HIV, you may still pass the virus to the baby in your breast milk.
Viracept is not approved for use by anyone younger than 2 years old.
How should I take Viracept?
Take Viracept exactly as prescribed by your doctor. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.
Read all patient information, medication guides, and instruction sheets provided to you. Ask your doctor or pharmacist if you have any questions.
Viracept works best if you take it with food.
Swallow the Viracept tablet whole.
If you cannot swallow a whole tablet, dissolve it in a small amount of water. Stir this mixture and drink all of it right away. To make sure you get the entire dose, add a little more water to the same glass, swirl gently and drink right away.
If a child is using this medicine, tell your doctor if the child has any changes in weight. Viracept doses are based on weight in children, and any changes may affect your child's dose.
Use Viracept regularly to get the most benefit. Get your prescription refilled before you run out of medicine completely.
HIV/AIDS is usually treated with a combination of drugs. Use all medications as directed by your doctor. Read the medication guide or patient instructions provided with each medication. Do not change your doses or medication schedule without your doctor's advice. Every person with HIV or AIDS should remain under the care of a doctor.
While using Viracept, you may need frequent blood tests.
Store at room temperature away from moisture and heat.
Viracept dosing information
Usual Adult Dose of Viracept for HIV Infection:
1250 mg orally twice a day (preferred regimen) or 750 mg orally 3 times a day
Approved indication: In combination with other antiretroviral agents, for the treatment of HIV-1 infection
Usual Adult Dose of Viracept for Nonoccupational Exposure:
(Not approved by FDA)
CDC recommendations: 1250 mg orally twice a day (preferred regimen) or 750 mg orally 3 times a day
Duration of therapy: 28 days
-Prophylaxis should be started as soon as possible, within 72 hours of exposure.
-In general, the alternative regimens recommended for nonoccupational postexposure HIV prophylaxis include nelfinavir as part of a protease inhibitor-based regimen.
Usual Pediatric Dose for HIV Infection:
2 to less than 13 years:
45 to 55 mg/kg orally twice a day or 25 to 35 mg/kg orally 3 times a day
Maximum dose: 2500 mg/day
Oral powder (50 mg/g):
9 to less than 10.5 kg: 2.5 teaspoons (tsp) (10 scoops) orally twice a day or 1.5 tsp (6 scoops) orally 3 times a day
10.5 to less than 12 kg: 2.75 tsp (11 scoops) orally twice a day or 1.75 tsp (7 scoops) orally 3 times a day
12 to less than 14 kg: 3.25 tsp (13 scoops) orally twice a day or 2 tsp (8 scoops) orally 3 times a day
14 to less than 16 kg: 3.75 tsp (15 scoops) orally twice a day or 2.25 tsp (9 scoops) orally 3 times a day
16 to less than 18 kg: 2.5 tsp (10 scoops) orally 3 times a day
18 to less than 23 kg: 3 tsp (12 scoops) orally 3 times a day
23 kg or more: 3.75 tsp (15 scoops) orally 3 times a day
-For twice daily dosing, nelfinavir tablets are recommended for children weighing 16 kg or more.
Tablets (250 mg):
10 to 12 kg: 500 mg orally twice a day or 250 mg orally 3 times a day
13 to 18 kg: 750 mg orally twice a day or 500 mg orally 3 times a day
19 to 20 kg: 1000 mg orally twice a day or 500 mg orally 3 times a day
21 kg or more: 1000 to 1250 mg orally twice a day or 750 mg orally 3 times a day
13 years or older:
Tablets: 1250 mg orally twice a day (preferred regimen) or 750 mg orally 3 times a day
Approved indication: In combination with other antiretroviral agents, for the treatment of HIV-1 infection
See also: Dosage Information (in more detail)
What happens if I miss a dose?
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
What should I avoid while taking Viracept?
If you also take didanosine, take it 1 hour before or 2 hours after you take Viracept.
Taking this medicine will not prevent you from passing HIV to other people. Do not have unprotected sex or share razors or toothbrushes. Talk with your doctor about safe ways to prevent HIV transmission during sex. Sharing drug or medicine needles is never safe, even for a healthy person.
Viracept side effects
Get emergency medical help if you have signs of an allergic reaction to Viracept: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
easy bruising, unusual bleeding (nose, mouth, vagina, or rectum), purple or red pinpoint spots under your skin; or
high blood sugar - increased thirst, increased urination, hunger, dry mouth, fruity breath odor, drowsiness, dry skin, blurred vision, weight loss.
Viracept may increase your risk of certain infections or autoimmune disorders by changing the way your immune system works. Symptoms may occur weeks or months after you start treatment with Viracept. Tell your doctor if you have:
signs of a new infection - fever, night sweats, swollen glands, mouth sores, diarrhea, stomach pain, weight loss;
chest pain (especially when you breathe), dry cough, wheezing, feeling short of breath;
cold sores, sores on your genital or anal area;
rapid heart rate, feeling anxious or irritable, weakness or prickly feeling, problems with balance or eye movement;
trouble speaking or swallowing, severe lower back pain, loss of bladder or bowel control; or
swelling in your neck or throat (enlarged thyroid), menstrual changes, impotence, loss of interest in sex.
Common Viracept side effects may include:
nausea, diarrhea, gas, stomach pain;
loss of appetite;
changes in the shape or location of body fat (especially in your arms, legs, face, neck, breasts, and waist).
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
See also: Side effects (in more detail)
What other drugs will affect Viracept?
Many drugs can interact with nelfinavir. Not all possible interactions are listed here. Tell your doctor about all your current medicines and any you start or stop using, especially:
any other antiviral medicines to treat HIV;
warfarin (Coumadin, Jantoven);
an antibiotic - azithromycin, rifabutin;
cholesterol medication - atorvastatin, rosuvastatin;
medicine to prevent organ transplant rejection - cyclosporine, sirolimus, tacrolimus;
medicine to treat impotence or pulmonary arterial hypertension - avanafil (Stendra), sildenafil (Viagra), tadalafil (Adcirca, Cialis), or vardenafil (Levitra, Staxyn); or
seizure medicine - phenobarbital, phenytoin.
This list is not complete and many other drugs can interact with nelfinavir. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Give a list of all your medicines to any healthcare provider who treats you.
More about Viracept (nelfinavir)
- Side Effects
- During Pregnancy or Breastfeeding
- Dosage Information
- Drug Images
- Drug Interactions
- Support Group
- Pricing & Coupons
- En Español
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- Drug class: protease inhibitors
Related treatment guides
Where can I get more information?
- Your pharmacist can provide more information about Viracept.
- Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use Viracept only for the indication prescribed.
- Disclaimer: Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.
Copyright 1996-2018 Cerner Multum, Inc. Version: 14.02. Revision Date: 2016-05-13, 10:47:45 AM.