Page 134 - Pharmaceutics IV (02-06-01305)
P. 134

Ophthalmic DD: dosage forms

                     Liquid preparations

Emulsions
• Limitations: they are difficult formulations to preserve (surfactants &

  preservatives!) and difficult to manufacture under sterile conditions.

261

  Ophthalmic DD: dosage forms

                    Semisolid preparations

  Ointments
  • Formulation concept:
  They are generally suspensions of drugs (micronized) in a base of
  mineral oil (liquid paraffin) and petrolatum (soft paraffin). They soften and
  melt at body temperature.

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Salma E. EL-Habashy
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