By Beth Aust, RN The Myer’s Cocktail is an intravenous vitamin-and-mineral formula for the treatment of a wide range of clinical conditions. The basic “Myers’ cocktail,” which consists of magnesium sulfate, potassium chloride, B vitamins(B complex, B 6, B 12), and vitamin C, has been found to be effective against acute asthma attacks, migraines, fatigue (including chronic fatigue syndrome), fibromyalgia, acute muscle spasm, upper respiratory tract infections, chronic sinusiti