Health Guide


What is it?

Isoprinosine is a nucleoside (one of the basic compounds comprising cells in the body). It is marketed as a drug in many nations (but not yet in the United States). It is used as an immune stimulator for cancer, herpes, and AIDS.

Other names for Isoprinosine include: Isoprinosine Pranobex.

Ask your doctor, nurse, or pharmacist if you need more information about this medicine or if any information in this leaflet concerns you.

Before Using:

Tell your doctor if you

  • are taking medicine or are allergic to any medicine (prescription or over-the-counter (OTC) or dietary supplement)
  • are pregnant or plan to become pregnant while using this medicine
  • are breastfeeding
  • have any other health problems, such as high blood pressure or heart or blood vessel disease


Talk with your caregiver about how much Isoprinosine you should take. The amount depends on the strength of the medicine and the reason you are taking Isoprinosine. If you are using this medicine without instructions from your caregiver, follow the directions on the medicine bottle. Do not take more medicine or take it more often than the directions tell you to.

To store this medicine:

Keep all medicine locked up and away from children. Store medicine away from heat and direct light. Do not store your medicine in the bathroom, near the kitchen sink, or in other damp places. Heat or moisture may cause the medicine to break down and not work the way it should work. Throw away medicine that is out of date or that you do not need. Never share your medicine with others.


  • Before taking Isoprinosine, tell your doctor if you are pregnant or breastfeeding
  • Those with gout or a predisposition to develop gout should not use Isoprinosine (5)

Side Effects:

Stop taking your medicine right away and talk to your doctor if you have any of the following side effects. Your medicine may be causing these symptoms which may mean you are allergic to it.

  • Breathing problems or tightness in your throat or chest
  • Chest pain
  • Skin hives, rash, or itchy or swollen skin

Other Side Effects:

This medicine may also cause other side effects. Tell your doctor if you have side effects that you think are caused by this medicine.


1. Scandinavian Isoprinosine Study Group, Hidovre, Denmark: Isoprinosine reduced clinical progression in HIV infected patients in a double blind placebo controlled study (abstract). Fifth International Conference on AIDS 1989: 219.

2. Tsang KY, Pan JF, Swanger DL et al: In vitro restoration of immune responses in aging humans by isoprinosine. International Journal of Immunopharmacology 1985; 7:199-206.

3. Tsang PH, Tangnavarad K, Solomon S et al: Modulation of T- and B- Lymphocyte functions by isoprinosine in homosexual subjects with prodromata and in patients with Acquired Immune Deficiency Syndrome (AIDS). Journal of Clinical Immunology 1984;4:469-478.

4. Wiedermann D, Wiedermannova D & Lokaj J: Immunorestoration in children with recurrent respiratory infections treated with isoprinosine. International Journal of Immunopharmacology 1987; 9:947-949.

5. Hendler SS: The Doctors' Vitamin and Mineral Encyclopedia. Fireside Press, New York, NY; 1990.

Last Updated: 4/4/2018
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