Answer
In Optrex Bloodshot Eye Drops, naphazoline is a sympathomimetic amine whose pronounced alpha-adrenergic activity causes vasoconstriction, while distilled witch hazel has astringent properties.
Sources for this answer
- Optrex Bloodshot Eye DropsReckitt Benckiser Healthcare (UK) Ltd · emc · SmPC §5.1 Pharmacodynamic properties · Version 6Document updated
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