- HIV AIDS Myths and Facts Slideshow Pictures
- Take the HIV/AIDS Quiz
- AIDS Retrospective Slideshow Pictures
- What is indinavir, and how does it work (mechanism of action)?
- What brand names are available for indinavir?
- Is indinavir available as a generic drug?
- Do I need a prescription for indinavir?
- What are the side effects of indinavir?
- What is the dosage for indinavir?
- Which drugs or supplements interact with indinavir?
- Is indinavir safe to take if I'm pregnant or breastfeeding?
- What else should I know about indinavir?
What is indinavir, and how does it work (mechanism of action)?
Indinavir is an oral medication that is used for treating infections with the human immunodeficiency virus (HIV). It is in a class of drugs called protease inhibitors which also includes ritonavir (Norvir), nelfinavir (Viracept) and saquinavir (Invirase, Fortovase). During infection with HIV, the HIV virus multiplies within the body's cells. Viruses are released from the cells and spread throughout the body where they infect other cells. In this manner, HIV infection is perpetuated among new cells that the body produces continually. During the production of the viruses, new proteins are made. Some of the proteins are structural proteins, that, is, proteins that form the body of the virus. Other proteins are enzymes which manufacture DNA and other components for the new viruses. Protease is the enzyme that forms the new structural proteins and enzymes. Indinavir blocks the activity of protease and results in the formation of defective viruses that are unable to infect the body's cells. As a result, the number of viruses in the body (the viral load) decreases. Nevertheless, indinavir does not prevent the transmission of HIV among individuals, and it does not cure HIV infections or AIDS. Indinavir was approved by the FDA in March 1995.
What are the side effects of indinavir?
The most common side effects of indinavir are:
- abdominal pain,
- insomnia and
- abnormal taste sensation.
Other important side effects include:
Like other protease inhibitors, use of indinavir may be associated with:
Kidney stones may be prevented by adequate fluid intake. Adequate fluid intake can be achieved by consuming at least 48 ounces of fluid daily. Immune reconstitution syndrome which is an inflammatory response to infection may occur in patients treated with combination antiretroviral therapy.
Quick GuideHIV AIDS Facts: Symptoms and Treatments
What is the dosage for indinavir?
The recommended dose for adults is 800 mg every eight hours. Food reduces the absorption of indinavir. Therefore, for optimal absorption, indinavir should be taken with water one hour before or two hours after a meal; however, it may administered with skim milk, juice, coffee, tea or with a light meal such as dry toast or corn flakes.
The dose of indinavir should be reduced to 600 mg every 8 hours when it is combined with delaviridine (Rescriptor), itraconazole (Sporanox), ketoconazole (Nizoral), or in patients with liver failure. The dose of indinavir should be increased to 1000 mg every 8 hours when it is combined with rifabutin (Mycobutin).
Which drugs or supplements interact with indinavir?
Indinavir interacts with many drugs. Some of the important interactions are mentioned below. Patients should consult their health care professional before combining any drugs with indinavir.
Triazolam (Halcion), midazolam (Versed), alprazolam (Xanax), pimozide, lovastatin (Mevacor), simvastatin (Zocor), ergot derivatives (for example, ergotamine, dihydroergotamine), and amiodarone (Cordarone) should not be combined with indinavir due to the risk of serious adverse effects resulting from indinavir increasing the blood levels of these drugs.
Indinavir increases blood concentrations of stavudine (Zerit), alfuzosin (Uroxatral), oral contraceptives, and clarithromycin (Claritin). Increased blood levels may result in more frequent side effects.
Indinavir decreases the blood concentration of didanosine (Videx) in the body and can thereby reduce the effectiveness of didanosine. Therefore, when didanosine and indinavir are both being used for treatment, their ingestion should be separated by one hour.
Indinavir also may inhibit the break-down of the cholesterol-lowering drugs lovastatin (Mevacor), simvastatin (Zocor), and atorvastatin (Lipitor). This may increase the risk of muscle breakdown (rhabdomyolysis) that may be seen when these drugs accumulate in the body.
Ketoconazole (Nizoral), itraconazole (Sporanox), delavirdine (Rescriptor) and clarithromycin (Claritin) can increase blood levels of indinavir and result in more frequent or severe side effects from indinavir.
Is indinavir safe to take if I'm pregnant or breastfeeding?
Use of indinavir during pregnancy has not been adequately evaluated.
It is not known whether indinavir is excreted in breast milk. Nevertheless, HIV-infected mothers should not breastfeed because of the potential risk of transmitting HIV to an infant that is not infected.
What else should I know about indinavir?
What preparations of indinavir are available?
Capsules: 100, 200, and 400 mg
How should I keep indinavir stored?
Indinavir should be stored at room temperature, 15 C to 30 C (59 F to 86 F), in the original container and kept away from moisture. The desiccant (drying agent) in the original bottle should not be discarded.
Reference: FDA Prescribing Information
Quick GuideHIV AIDS Facts: Symptoms and Treatments
Indinavir (Crixivan) is a medication prescribed for the treatment of infections with the human immunodeficiency virus (HIV). Side effects, dosing, and in particular, drug interactions should be discussed with our health care professional prior to taking this medication.
Multimedia: Slideshows, Images & Quizzes
Related Disease Conditions
Human Immunodeficiency Virus (HIV)
The human immunodeficiency virus (HIV) causes HIV infection and the acquired immunodeficiency syndrome (AIDS). Symptoms and signs...
Acquired Immunodeficiency Syndrome
AIDS is the advanced stage of HIV infection. Symptoms and signs of AIDS include pneumonia due to Pneumocystis jiroveci,...
Treatment & Diagnosis
- What Are the Symptoms and Signs of Kidney Stones?
- How To Reduce Your Medication Costs
- Pharmacy Visit, How To Get The Most Out of Your Visit
- Indications for Drugs: Approved vs. Non-approved
- Generic Drugs, Are They as Good as Brand-Names?
- Drugs: Buying Prescription Drugs Online Safely
- Medication Disposal - What to Do with Old or Unusable Medication
- Dangers of Mixing Medications
- Drugs: The Most Common Medication Errors
Medications & Supplements
Prevention & Wellness
Daily Health News
Resources for Staying Well
Subscribe to MedicineNet's General Health Newsletter
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
Top indinavir Related ArticlesComplete List
Acquired Immunodeficiency Syndrome (AIDS)AIDS is the advanced stage of HIV infection. Symptoms and signs of AIDS include pneumonia due to Pneumocystis jiroveci, tuberculosis, toxoplasmosis, seizures, weakness, meningitis, yeast infection of the esophagus, and Kaposi's sarcoma. Anti-retroviral therapy (HAART) is used in the treatment of AIDS.
amprenavirAmprenavir (Agenerase - discontinued brand) is a drug prescribed to treat infections with the human immunodeficiency virus (HIV). Side effects, drug interactions, and pregnancy safety information should be reviewed prior to taking this medication.
atazanavirAtazanavir (Reyataz) is a drug prescribed for the treatment of HIV infections. Side effects, drug interactions, and patient warnings should be reviewed prior to taking this medication.
Drug InteractionsDrug interactions occur frequently. Get facts about the types of drug interactions, what substances or other things that may interact with drugs such as OTC drug and prescription drugs, vitamins, food(s) (grapefruit), and laboratory tests. Find out how to protect yourself from potential drug interactions.
Drugs: What You Should Know About Your DrugsImportant information about your drugs should be reviewed prior to taking any prescription drug. Side effects, drug interactions, warnings and precauctions, dosage, what the drug is used for, what to do if you miss a dose, how the drug is to be stored, and generic vs. brand names.
Human Immunodeficiency Virus (HIV)The human immunodeficiency virus (HIV) causes HIV infection and the acquired immunodeficiency syndrome (AIDS). Symptoms and signs of HIV infection include fatigue, enlarged lymph glands, and recurrent vaginal yeast infections. Highly active antiretroviral therapy (ART) is the standard treatment for HIV infection.
Kidney Stone SlideshowWhat causes kidney stones? Learn to recognize the symptoms and signs of kidney stone pain. Explore kidney stone treatment and how to prevent kidney stones.
lopinavir and ritonavirLopinavir and ritonavir (Kaletra) is a drug that is a combination of lopinavir and ritonavir that is prescribed to treat human immunodeficiency virus (HIV). Side effects , drug interactions, pregnancy information, and warnings and precautions should be reviewed prior to taking this medication.
nelfinavirNelfinavir (Viracept) is a drug prescribed to be used in combination with other anti-HIV drugs to treat HIV infection. Side effects, drug interactions, dosage, and pregnancy safety should be reviewed prior to taking this medication.
Protease Inhibitors (PI) Drug Class
Protease Inhibitors (PIs) are a class of antiviral drugs prescribed to treat HIV and hepatitis (HCV) viral infections. There are several protease inhibitors that treat HIV infection, for example:
- Lexiva (fosamprenavir)
- Invirase (saquinavir)
- Kaletra (lopinavir/ritonavir)
- Viracept (nelfinavir)
- Norvir (ritonavir)
Examples of hepatitis C virus protease inhibitors include:
- Olysio (simeprevir)
- Technivie (ombitasvir/paritaprevir and ritonavir, a combination of these three drugs)
- Viekira Pak (ombitasvir/paritaprevir/ritonavir and dasabuvir, a combination of these four drugs)
Drug interactions, dosage, preparations, and pregnancy and breastfeeding safety should be reviewed prior to taking these drugs.
ritonavirRitonavir (Norvir) is a drug used in combination with other drugs for the treatment of HIV infection. Side effects, drug interactions, and dosing information should be reviewed prior to taking this medication.