Suspensions

Preparations containing finely divided drug particles (the suspenoid) distributed somewhat uniformly throughout a vehicle in whih the drug exhibits a minimum degree of solubility

• The dispered phase
• The dispersing phase (dispersing medium)

• Coarse dispersion
• Fine and colloidal dispersion

• Dugs stability
• Liquid therapy
• Flexability of dosage forms dry powder fro reconsitiution
• Palatability

• V: Velocity of fall of particle (rate of sedimentation
• d: diameter of the particle
• pi: density of the particle
• pe: density of the medium
• g: gravitational constant
• n: vicosity of the dispersion medium

Extend of settling and ease of dispersibility

Particle size