Question 47

A formulation in which the drug does not completely dissolve in the diluent is known as a suspension.

A suspension is a type of formulation where the active ingredient is dispersed throughout a liquid but not fully dissolved, making it a suitable choice for this question.

A) elixir

An elixir is a clear liquid that contains a dissolved drug and is usually sweetened and flavored. Since an elixir implies that the drug is fully dissolved in the solvent, this option is incorrect.

B) solution

A solution refers to a homogeneous mixture in which the solute is completely dissolved in the solvent. This characteristic of complete dissolution disqualifies solution from being the correct answer.

C) suspension

A suspension is characterized by the presence of solid particles that are not fully dissolved in a liquid. This definition aligns perfectly with the question's requirement, making it the correct answer.

D) syrup

A syrup is a concentrated solution of sugar in water or other liquid, often containing dissolved substances. Since it indicates that the drug is fully dissolved in the syrup, this option does not fit the criteria set by the question.

Conclusion

Suspensions uniquely embody the characteristic of having undissolved particles in a liquid medium, distinguishing them from other formulations like elixirs, solutions, and syrups, all of which require complete dissolution of the active ingredient. Thus, option C is definitively correct, while all other options fail to meet the criteria presented in the question.