4. Eye drops

4.1 Solutions

Eye drops are the most widely used ophthalmic form, and a very large number of ophthalmic forms are marketed as solutions.

4.1.1 Formulation

Formulation involves a number of excipients linked to the characteristics of the solution form and the active ingredient. For the latter, the essential points to study are its solubility, pH of solubility/stability in solution, osmotic activity and stability in solution. The main formulation steps involve dissolution/solubilization, adjustment...