Cat · Felis catus · typical adult weight 2.50–7.00 kg
Tropicamide is dosed at 1 drop/eye TOPICAL Single application in cats, per BSAVA Small Animal Formulary, 10th ed. (2020), Part A - Canine and Feline, printed p.420 (corpus PDF p.436), Tropicamide, DOSES - "Dogs, Cats: 1 drop per eye, repeat after 20-30 min if necessary." Formulary of record retained: Plumb's Veterinary Drug Handbook (9th ed. cited; 10th ed. 2023 held), Tropicamide Ophthalmic, Dosages, printed p.1410 (corpus PDF p.1437) - "Mydriasis (extra-label): 1 to 2 drops repeated in 5 minutes in the eye to be examined to achieve pupillary dilation." — Plumb's 10th ed (held) printed p.1410, Tropicamide Ophthalmic monograph; page located 2026-08-05 from the book's own running heads, verified to name the drug in its body text. — EDITION NOTE 2026-08-06: this rule's Plumb's reference names the 9th edition, which is not held and was never consulted. The held copy is the 10th ed (2023). The Plumb's line was never confirmed against the held edition, so rely on it only as background; any other source named in this citation is unaffected. — SOURCE EDITION: BSAVA Small Animal Formulary, Part A — Canine and Feline — ISBN 9781910443705, https://openlibrary.org/isbn/9781910443705; Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207. Tropicamide is used in cats for Diagnostic mydriasis. Routes documented in cats: TOPICAL. A typical adult cat weighs 2.50–7.00 kg. ExoticRx lists 1 cited dose rule for Tropicamide in cats, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Mydriacyl
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| TOPICAL | 1 drop/eye | Single application | Diagnostic | Diagnostic mydriasis | Weak | BSAVA Small Animal Formulary, 10th ed. (2020), Part A - Canine and Feline, printed p.420 (corpus PDF p.436), Tropicamide, DOSES - "Dogs, Cats: 1 drop per eye, repeat after 20-30 min if necessary." Formulary of record retained: Plumb's Veterinary Drug Handbook (9th ed. cited; 10th ed. 2023 held), Tropicamide Ophthalmic, Dosages, printed p.1410 (corpus PDF p.1437) - "Mydriasis (extra-label): 1 to 2 drops repeated in 5 minutes in the eye to be examined to achieve pupillary dilation." — Plumb's 10th ed (held) printed p.1410, Tropicamide Ophthalmic monograph; page located 2026-08-05 from the book's own running heads, verified to name the drug in its body text. — EDITION NOTE 2026-08-06: this rule's Plumb's reference names the 9th edition, which is not held and was never consulted. The held copy is the 10th ed (2023). The Plumb's line was never confirmed against the held edition, so rely on it only as background; any other source named in this citation is unaffected. — SOURCE EDITION: BSAVA Small Animal Formulary, Part A — Canine and Feline — ISBN 9781910443705, https://openlibrary.org/isbn/9781910443705; Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207 |
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Short-acting muscarinic antagonist that blocks the sphincter pupillae muscle, causing mydriasis. Also causes cycloplegia (ciliary muscle paralysis).
Short duration (4-8 hours). Used for diagnostic fundoscopy. May increase IOP — CONTRAINDICATED in glaucoma. Not for therapeutic mydriasis (use atropine for that). Rapid onset (15-20 min).
Species-specific contraindications and adverse-reaction reports for cats may differ from canine / feline reference data — consult the primary citations listed with each rule.
Tropicamide dose range in cats, with cited source references: TOPICAL 1 drop/eye Single application. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Tropicamide in cats: TOPICAL.
Cited course lengths for Tropicamide in cats include: Diagnostic. Duration depends on the indication — match it to the specific dose rule in the table above.
Tropicamide is indicated in cats for: Diagnostic mydriasis.
These are general warnings for Tropicamide across species; consult the cat dosing table above for species-specific guidance. Short duration (4-8 hours). Used for diagnostic fundoscopy. May increase IOP — CONTRAINDICATED in glaucoma. Not for therapeutic mydriasis (use atropine for that). Rapid onset (15-20 min).
Why a species-specific page? Tropicamide pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in cats — the rules above are the citations specific to this species, not generic recommendations.
Sourced from published veterinary references; awaiting credentialed clinical reviewer. See our editorial process. Reference only — not veterinary advice.