4 AGOURON PHARMACEUTICALS, INC. La Jolla, CA 92037, USA VIRACEPT® (nelfinavir mesylate) TABLETS and ORAL POWDER DESCRIPTION VIRACEPT® (nelfinavir mesylate) is an inhibitor of the human immunodeficiency virus Nelfinavir mesylate (VIRACEPT) is an inhibitor of the human immunodeficiency virus (HIV) protease. Nelfinavir is indicated for the treatment of HIV infection. Nelfinavir oral powder contains phenylalanine and should be avoided by individuals with phenylketonuria. Like other protease inhibitors, use of nelfinavir may be associated with redistribution or accumulation of body fat, increased cholesterol and worsening of diabetes. How to use Nelfinavir 50 Mg/Gram Oral Powder. Read the Patient Information Leaflet provided by your pharmacist before you start using nelfinavir and each time you get a refill. Consumer information about the medication NELFINAVIR POWDER - ORAL (Viracept), includes side effects, drug interactions, recommended dosages, and storage information. Read more about the prescription drug NELFINAVIR POWDER - ORAL. If OVERDOSE is suspected: If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened. For solution (1) mix and transfer a quantity of the oral powder equivalent to about 0.10 g of nelfinavir, accurately weighed, into a 50 mL volumetric flask. Nelfinavir (brand name Viracept) is an antiretroviral drug used in the treatment of the human immunodeficiency virus (HIV). Nelfinavir belongs to the class of drugs known as protease inhibitors (PIs) and like other PIs is almost always used in combination with other antiretroviral drugs. How to use Viracept 50 Mg/Gram Oral Powder. Read the Patient Information Leaflet provided by your pharmacist before you start using nelfinavir and each time you get a refill. Store nelfinavir tablets and oral powder at room temperature, 59°F to 86°F (15°C to 30°C). Store nelfinavir in its original container and keep the container tightly closed. Do not use nelfinavir if the original seal over the container opening is broken or missing.