Dog · Canis lupus familiaris · typical adult weight 2.00–80.00 kg
Phenoxybenzamine Ophthalmic is used in dog for Pre-operative mydriasis (cataract surgery), Intraoperative pupil maintenance. Routes documented in dog: Ophthalmic. A typical adult dog weighs 2.00–80.00 kg. ExoticRx lists 2 cited dose rules for Phenoxybenzamine Ophthalmic in dog, drawn from published veterinary references. Verify against current literature before clinical use.
Trade names: Compounded Phenoxybenzamine Ophthalmic
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| Ophthalmic | 0 mg/kg | 1 drop q8h starting 24h before surgery | Pre-operative use only | Pre-operative mydriasis (cataract surgery) | Moderate | Gelatt KN, Veterinary Ophthalmology, 6th Ed |
| Ophthalmic | 0 mg/kg | 1 drop pre-operatively, repeat if needed | Single pre-operative use | Intraoperative pupil maintenance | Moderate | Gelatt KN, Veterinary Ophthalmology, 6th Ed |
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These ranges are per kg. Enter your dog's weight to get the precise dose and draw-up volume — unit and concentration math done for you.
Irreversible alpha-adrenergic antagonist that causes smooth muscle relaxation of the iris dilator, preventing miosis. Used to facilitate mydriasis in heavily pigmented irises.
Must be compounded. Used pre-operatively for cataract surgery in dogs with dark irises. Irreversible binding — effects last 24-48 hours. Local irritation possible.
Species-specific contraindications and adverse-reaction reports for dog may differ from canine / feline reference data — consult the primary citations listed with each rule.
Why a species-specific page? Phenoxybenzamine Ophthalmic pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in dog — 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.