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Aids - Lab Tests & FAQs





 
 Introduction
 Currently Approved Drugs for HIV
 Protease Inhibitors (PIs)
 Nucleoside Reverse Transcriptase Inhibitors (NRTIs)
 Non-nucleoside Reverse Transcriptase Inhibitors(NNRTIs)
 Nucleoside Reverse Transcriptase Inhibitors (NRTIs)
 How can HIV be inactivated?
 
Introduction
Human Immunodeficiency Virus attacks the CD4 immune cells, which are the immune system cells. CD4 cells trigger the immune system to create antibodies in order to fight off infection. As HIV destroys the CD4 cells, the function of immune system is suppressed and the affected person is not able to defend infection. As HIV reduces the CD4 cells, in your body, the person is unable to defend from infection. The immunosuppressed patient develops illness, infection and ultimately, AIDS. 

Treatment for AIDS
Treatment strategy for AIDS virus involves the following principles:

To have an effective drug that kills the HIV virus once it enters the body.

To create a vaccine that would prevent the disease. 

To educate people world wide about the dangers of AIDS and how to prevent the HIV infection.

On these principles current treatment against AIDS aims at :

Anti-HIV (also called antiretroviral) medications are used to control the reproduction of the virus and to slow the progression of HIV-related disease. 

Highly Active Antiretroviral Therapy (HAART) is the recommended treatment for HIV infection. 

HAART combines three or more anti-HIV medications in a daily regimen.

Anti-HIV medications do not cure HIV infection and individuals taking these medications can still transmit HIV to others.

Currently Approved Drugs for HIV

There are four essential group of drugs against AIDS :

Protease Inhibitors (PIs)

Nucleoside Reverse Transcriptase Inhibitors (NRTIs)

Non-nucleoside Reverse Transcriptase Inhibitors (NNRTIs)

Fusion Inhibitors

Protease Inhibitors (PIs)

PIs disable protease, a protein that HIV needs to make more copies of itself.

Long term side effects of protease inhibitors :

Change in blood sugar levels

Increase in blood fat levels

Deposition of fat in the abdomen and on the back of the shoulders.

Drug

Dosage

Side Effects

Invirase Five 200 mg capsules of Invirase + one 100 mg of Norvir, twice a day Nausea, diarrhea, stomach discomfort, insominia, headache, increased liver enzyme levels.
Invirase and Norvir should be taken with food, or within 2 hours after a meal.
Fortovase six 200 mg capsules, three times a day plus one 100 mg Norvir, twice daily. Nausea, diarrhea, stomach discomfort, insominia, headache, increased liver enzyme levels.
Norvir/Ritonavir six 100mg capsules, twice a day Nausea, diarrhea, stomach discomfort, insominia, headache, increased liver enzyme levels, loss of appetite, oral tingling and numbness.
Capsules should be stored in refrigerator, Used at lower doses to enhance other protease inhibitors.
Crixivan / Indinavir Two 400 mg capsules, every 8 hours Kidney stones, nausea, vomiting, diarrhea, stomach discomfort, headache, insomnia, rash, back pain. 
Take on an empty stomach, drink atleas 8 glasses of water daily to prevent kidney stone formation. 
Viracept / nelfinavir five 250 mg tablets, twice a day.  diarrhea, nausea, stomach discomfort, gas, rash, increased liver enzyme levels.
Drug to be taken with meal.
Agenerase / Amprenavir eight 150 mg capsules, twice a day Rash, diarrhea, nausea, vomiting, oral tingling and numbness.
Drug can be taken with or without food, but avoid taking high-fat meals.
Kaletra / Lopinavir + Ritonavir three capsules , twice a day. Diarrhea, nausea, feeling tired, headache, Pancreatitis.
Reyataz / atazanavir Two 200mg capsules, once a day Increased levels of bilirubin, headaches, pain in the arms and legs, nausea, diarrhea, rash.
Should be taken with a light meal.
Lexiva / fosamprenavir Two 700 mg tablets, twice a day Rash, diarrhea, nausea, vomiting.

Nucleoside Reverse Transcriptase Inhibitors (NRTIs)

NRTIs are faulty versions of building blocks that HIV needs to make more copies of itself. When HIV uses an NRTI instead of a normal building block, reproduction of the virus is stalled.

Long term side effects of NRTIs have been associated with damage to the mitochondria (the cell parts that provide energy to the cell). This damage may cause low red and white blood cell counts, muscle pain and wasting (particularly in the arms and legs), fatigue, peripheral neuropathy, and more rarely, serious liver (lactic acidosis) or pancreas problems. 

Drug

Dosage

Side Effects

Retrovir / AZT One 300 mg tablet daily Nausea, stomach discomfort, headache, insomnia, muscle wasting, anemia, neutropenia (low white blood cell count).
Medicine should be taken with food to reduce the stomach discomfort.
Epivir / 3TC one 300 mg tablet daily Nausea
Epivir is also taken for treatment of Hepatitis B virus, but with a different dosage.
Combivir / AZT + 3TC One tablet (300 mg AZT + 150 mg 3TC) Nausea, vomiting, headache, loss of appetite, fatigue, stomach discomfort, Muscle wasting, anemia (low blood cell count), neutropenia (low white blood cell count).
Trizivir / AZT + 3TC + Abacavir One tablet (300 mg AZT + 150 mg 3TC + 300 mg Abacavir) twice daily. Nausea, stomach discomfort, headache, insomnia, muscle wasting, anemia, neutropenia (low white blood cell count).
Ziagen / Abacavir One 300 mg tablet twice daily Nausea, vomiting, diarrhea, loss of appetite, insomnia, serious allergic reactions in 3-5% of patients with one death. The signs include - fever, mailaise, nausea, diarrhea, abdominal pain, sore throat, cough, shortness of breath, and rash. 
Videx / ddl   Numbness, lingling, or pain in the hands or feet, nausea, vomiting, diarrhea, headache and rash, Pancreatitis (inflammation of pancreas)
Zeritt / d4T One 40 mg capsule, every 12 hours.  Numbness, tingling, or pain in the hands or feet, nausea, diarrhea, vomiting, headache, rash, Pancreatitis, lactic acidosis.
HIVid / ddC 0.75 mg tablet, every 8 hours.  Numbness, tingling, or pain in the hands or feet, nausea, vomiting, mouth ulcers. 
Drug is to be taken in empty stomach.

Viread / tenofovir One 300 mg tablet once a day. Nausea, vomiting, diarrhea, intestinal gas.
Emtriva / Emtricitabine One 200 mg tablet daily Headache, nausea, vomiting, diarrhea, rash.
Non-nucleoside Reverse Transcriptase Inhibitors(NNRTIs)

NNRTIs bind to and disable reverse transcriptase, a protein that HIV needs to make more copies of itself.

Drug Dosage Side Effects
Viramune / Nevirapine One 200 mg tablet per day. Rash, stomach upset, headaches, increased liver enzymes, rarely hepatitis
Rescriptor/ Delaviridine Two 200 mg tablet thrice a day. Rash, hedache, fatigue, stomach upset, elevated liver enzymes.
Sustiva / Efavirinez One 600 mg tablet per day Rash, drowsiness, insomnia, confusion, inability to concentrate, dizziness, vivid dreams, nausea, stomach discomfort, fever, elevated liver enzymes
Nucleoside Reverse Transcriptase Inhibitors (NRTIs)

Fusion Inhibitors prevent HIV entry into cells.

Drug

Dosage

Side Effects

Fuzeon / T-20 Two 90 mg subcutaneous injections per day Skin reactions at the site of injection - itching, swelling, redness, pain or tenderness, hardened skin or bumps. 
How can HIV be inactivated?
HIV is completely inactivated by treatment with

10% Household bleach

50% ethanol

35% isopropanol

1%
Nonidet P40

0.5%
Lysol

0.5%
paraformaldehyde

0.3% hydrogen peroxide

The virus is also inactivated by extremes in pH (pH 1.0 and 13.0).

Virus is rapidly inactivated (<1 minute) by exposure to undiluted household bleach.

Virus is readily inactivated in liquids or 10% serum by heating at 56º C for 10 minutes.

Lyophilized blood products would need to be heated at 68º C for 72 hours to ensure inactivation of contaminating virus.

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