Clear liquids in which the drug is completely dissolved are known as?

The term for clear liquids in which a drug is completely dissolved is "solutions." In a solution, the solute (in this case, the drug) is uniformly distributed throughout the solvent, resulting in a clear appearance without any undissolved particles. Solutions are characterized by the homogeneity of their components and the ability of the dissolved drug to remain uniformly mixed in the liquid.

In contrast, emulsions involve a mixture of two immiscible liquids, such as oil and water, where one liquid is dispersed in the other but not completely dissolved. Suspensions consist of solid particles dispersed in a liquid but can separate upon standing, indicating that the drug is not fully dissolved. Sublimation refers to the process where a solid transitions directly to a gas without becoming a liquid, which is not applicable in the context of liquid formulations and drug solubility.