Atropine in canine uveitis: when it is contraindicated
In which of these dogs with anterior uveitis would topical atropine be contraindicated?
chevron_right Show answer and explanation
A. Labrador with traumatic uveitis, marked miosis and intraocular pressure of 7 mmHg
This is the classic indication: atropine relieves ciliary spasm pain, dilates the pupil to prevent posterior synechiae and stabilises the blood-aqueous barrier.
B. Basset Hound with uveitis and intraocular pressure of 32 mmHg
Correct. High pressure in an inflamed eye indicates secondary glaucoma, and the Basset is predisposed to angle-closure glaucoma. Mydriasis can narrow the angle further and precipitate a crisis.
C. Dog with reflex uveitis secondary to a superficial corneal ulcer
Atropine is useful here to relieve ciliary spasm pain; what is contraindicated with an ulcer is topical corticosteroids.
D. Dog with phacolytic uveitis, pressure of 9 mmHg and normal tear production
With low pressure and normal tear production there is no contraindication; atropine helps prevent synechiae.
lightbulb Key takeaway
Measure intraocular pressure before giving atropine. Avoid it in glaucoma or in predisposed breeds with borderline pressure and in anterior lens luxation, and use it with caution in dry eye because it reduces tear production. Stop it or space doses once the pupil is dilated.
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Updated: October 31, 2026 · Educational content for veterinary professionals. It does not replace current clinical guidelines or the judgement of the attending veterinarian.