Suspensions are heterogeneous liquid dosage forms in which insoluble solid particles are dispersed uniformly throughout a liquid medium. They are commonly used when drugs are insoluble or unstable in solution.
Suspensions are formulated using suspending agents, wetting agents, preservatives, sweeteners, and flavoring agents to ensure stability and patient acceptability.
Pharmaceutical suspensions are widely used for oral, topical, and parenteral administration of drugs that are poorly soluble in water.