The various components, which are used in suspension formulation, are as follows.
| Components | Function |
| API | Active drug substances |
| Wetting agents | They are added to disperse solids in continuous liquid phase. |
| Flocculating agents | They are added to floc the drug particles |
| Thickeners | They are added to increase the viscosity of suspension. |
| Buffers and pH adjusting agents | They are added to stabilize the suspension to a desired pH range. |
| Osmotic agents | They are added to adjust osmotic pressure comparable to biological fluid. |
| Coloring agents | They are added to impart desired color to suspension and improve elegance. |
| Preservatives | They are added to prevent microbial growth. |
| External liquid vehicle | They are added to construct structure of the final suspension. |
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