Page 134 - Pharmaceutics IV (02-06-01305)
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Ophthalmic DD: dosage forms
Liquid preparations
Emulsions
• Limitations: they are difficult formulations to preserve (surfactants &
preservatives!) and difficult to manufacture under sterile conditions.
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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