Classification Of Pharmaceutical Suspension
Suspensions are an important class of pharmaceutical dosage form. They are made up of coarse dispersion of insoluble solid particles in a liquid medium. The particle diameter in a suspension is usually greater than 0.5 µm. However, it is difficult and also impractical to impose a sharp boundary between the suspensions and the dispersions having finer particles. Pharmaceutical suspension Classification Of Pharmaceutical Suspension 1. Based on General Classes (Route Of Drug Administration) i. Oral suspension ii. Externally applied suspension (topical, ophthalmic, otic, nasal) iii. Parenteral suspension 2. Based On Proportion Of Solid Particles i. Dilute suspension (2 to 10 % w/v solid) ii. Concentrated suspension (50 % w/v solid) iii. Slur-ries (> 50 % w/w solid) 3. Based On Electro Kinetic Nature Of Solid Particles i. Flocculated suspension ii. Deflocculated suspension 4. Based On Size Of Solid Particles i. Colloidal suspension (< 1 micron) ii. Coarse suspension (>1 micron) iii...
