The base of Myers Cocktail IV therapy is a saline and electrolyte solution, which boosts the body’s level of hydration right away. The Myers cocktail is a 30- to 45-minute-long intravenous infusion of vitamins and minerals that is given straight into a vein. The use of Myers’ cocktail, an intravenous (IV) vitamin therapy, as a medical treatment is not backed by any scientific research.