Suspension
Types and examples
Theory
Components of suspension
1.Particle size of the dispersed phase
2.Concentration of the dispersed phase
3.Type of the dispersion medium
4.Route of administration
5.Feature of dispersed phase
1.Oral suspensions
2.Topical suspensions lotion
3.Injectable suspensions
4.otic suspension
5.Ophthalmic suspensions
1.Suspensions containing diffusible solids
2.Suspension containing indiffusible solids
- Suspensions containing poorly wettable solids
4.Suspensions produced by chemical reaction
- The solid-liquid interface
- Sedimentation
- Solid particle interaction
- Crystall growth
- Rheology
- Drug : uniform particles size in the range of 1-50
- Components of the suspending system
- Components of the suspending vehicle or external phase
Wetting agents
Flocculating agents
Suspending agents
Natural plant hydrocolloids
Cellulose derivatives
Clays
Synthetic polymers
Preparation of suspensions