Paper I
2020 February (Supplementary) (2010 Scheme) · 40 marks · 120 min

Question

Physostigmine / Neostigmine in glaucoma management Name the following (Two examples for each): (5x1=5)

Q150.3 marksShort Answers

Answer

Chosen drug: Physostigmine

Justification: Physostigmine is a tertiary amine (lipid-soluble) that penetrates the cornea well when applied topically, giving effective miotic/intraocular pressure-lowering effect with less local irritation. Neostigmine, a quaternary ammonium compound, is poorly lipid-soluble and penetrates the cornea poorly, making it far less effective as a topical agent for glaucoma — physostigmine is therefore the appropriate choice.

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