Products Antihistamines are often taken in the form of tablets. In addition, drops, solutions, lozenges, capsules, gels, creams, eye drops, nasal sprays, and injectable solutions are also available, among others. The first active ingredient from this group was phenbenzamine (Antergan), developed in France in the 1940s. It is no longer commercially available today. Structure and … Antihistamines for Allergies
Products Terfenadine (Teldane tablets/suspension) is no longer on the market in many countries. Possible alternatives are the successor product fexofenadine (Telfast) or other 2nd generation antihistamines. Structure and properties Terfenadine (C32H41NO2, Mr = 471.7 g/mol) is a racemate. It exists as a white crystalline powder that is very sparingly soluble in water. Terfenadine is a … Terfenadine
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 They are discovered, patented, developed, approved, marketed and, in some circumstances, withdrawn from the market years to decades later.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
