This document discusses monophasic liquids and their advantages and disadvantages as drug delivery systems. It provides examples of different types of monophasic liquids including syrups, elixirs, gargles, and mouthwashes. Syrups can be simple (containing 66.7% w/w sugar) or flavored. Elixirs contain 5-40% alcohol as a preservative. The document also notes some challenges with monophasic liquids like their bulkiness and potential for microbial growth or drug degradation.