A formulation in which the drug does not completely dissolve in the diluent is known as:

Rationale

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

In a suspension, the active drug particles are dispersed throughout the liquid but are not fully dissolved, allowing for a mixture that may require shaking before use. This contrasts with other formulations where the drug is completely dissolved.

A (elixir) YOUR ANSWER

An elixir is a clear, sweetened hydroalcoholic solution that contains a drug fully dissolved in the liquid. Since the drug is soluble in the solvent, it does not meet the criteria of a formulation in which the drug does not completely dissolve.

B (solution) YOUR ANSWER

A solution refers to a homogeneous mixture where the drug is completely dissolved in the solvent, resulting in a clear and stable formulation. This characteristic fundamentally differentiates solutions from suspensions, where undissolved particles are present.

C (suspension) CORRECT

Suspensions consist of solid drug particles dispersed in a liquid medium, where the particles do not fully dissolve. This formulation requires agitation for proper mixing and is suitable for administering drugs that are insoluble or poorly soluble in the chosen diluent.

D (syrup) YOUR ANSWER

A syrup is a concentrated solution of sugar in water, often with added medicinal components. Like solutions and elixirs, the drug in a syrup is fully dissolved, which means it cannot be classified as a formulation where the drug does not completely dissolve.

Conclusion

The correct identification of a formulation where the drug remains undissolved is essential for understanding pharmaceutical preparations. A suspension is characterized by the presence of undissolved drug particles, distinguishing it from solutions, elixirs, and syrups, where the drug is entirely dissolved. Recognizing these differences is vital in pharmaceutical practice to ensure proper drug administration and effectiveness.

A formulation in which the drug does not completely dissolve in the diluent is known as:

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

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