fansidar

Sulfonamides

Effect Antibacterial Bakeriostatic Antiparasitic against protozoa Mechanism of action Sulfonamides inhibit the synthesis of folic acid in microorganisms. They are structural analogues (antimetabolites) of the natural substrate p-aminobenzoic acid and competitively displace it. Trimethoprim, used in combination with sulfamethoxazole, has a synergistic effect. Indications Bacterial infectious diseases caused by: Streptococcus Pneumococcus Actinomycetes Nocardia, e.g. nocaridosis … Sulfonamides

Pyrimethamine

Products Pyrimethamine is commercially available in tablet form (Daraprim). The combination Fansidar (+ sulfadoxine) is off the market (malaria). Structure and properties Pyrimethamine (C12H13ClN4, Mr = 248.7 g/mol) is a diaminopyrimidine. It exists as a white crystalline powder or as colorless crystals and is practically insoluble in water. Effects Pyrimethamine (ATC P01BD01) has antiparasitic properties. … Pyrimethamine

Market Withdrawal of Drugs

Why is the distribution of medicines discontinued? Drugs are subject to a product life cycle. They are discovered, patented, developed, approved, marketed and, in some circumstances, withdrawn from the market years to decades later. Often, distribution is discontinued due to commercial considerations. For example, the cost of approval and production exceeds the revenue from sales. … Market Withdrawal of Drugs