Dog · Canis lupus familiaris · typical adult weight 2.00–80.00 kg
Dichlorvos is dosed at 26.4–33 mg/kg PO once in dogs, per Verified against Papich/Saunders Handbook of Veterinary Drugs, 4th Ed, p.260 (2026-08-01). — LOCATOR CONVENTION 2026-08-07: the bare 'p.260' in this citation is the PDF index of the held scan, not the printed page. The PRINTED page is p.232; verified by finding the drug named there. If you are holding the book, turn to p.232. — SOURCE EDITION: Saunders Handbook of Veterinary Drugs — ISBN 9780323244855, https://openlibrary.org/isbn/9780323244855. Dichlorvos is used in dogs for GI nematodes (obsolete). Routes documented in dogs: PO. A typical adult dog weighs 2.00–80.00 kg. ExoticRx lists 1 cited dose rule for Dichlorvos in dogs, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Vapona, Task
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| PO | 26.4–33 mg/kg | once | Single dose | GI nematodes (obsolete) | Weak | Verified against Papich/Saunders Handbook of Veterinary Drugs, 4th Ed, p.260 (2026-08-01). — LOCATOR CONVENTION 2026-08-07: the bare 'p.260' in this citation is the PDF index of the held scan, not the printed page. The PRINTED page is p.232; verified by finding the drug named there. If you are holding the book, turn to p.232. — SOURCE EDITION: Saunders Handbook of Veterinary Drugs — ISBN 9780323244855, https://openlibrary.org/isbn/9780323244855 |
Every held source for this drug and species, as printed. Where they differ, both are shown — the choice is yours, not ours.
| Dose (mg/kg) | Route | Source | As printed |
|---|---|---|---|
| 26.4–33 | PO | Papich Saunders Handbook of Veterinary Drugs, 4th edp.260 | • 26.4-33 mg/kg once PO. • 11 mg/kg once PO. |
| 11 | PO | Papich Saunders Handbook of Veterinary Drugs, 4th edp.260 | • 26.4-33 mg/kg once PO. • 11 mg/kg once PO. |
Figures are transcribed from the cited page or table of each held edition and are shown for reference only. They are not dose recommendations, they do not feed the calculator, and none has been reviewed by a veterinarian.
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Irreversible acetylcholinesterase inhibitor causing accumulation of acetylcholine at parasitic neuromuscular junctions.
Organophosphate toxicity risk. Do not combine with other cholinesterase inhibitors. Antidote: atropine + pralidoxime. Largely replaced by safer alternatives.
Species-specific contraindications and adverse-reaction reports for dogs may differ from canine / feline reference data — consult the primary citations listed with each rule.
Dichlorvos dose range in dogs, with cited source references: PO 26.4–33 mg/kg once. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Dichlorvos in dogs: PO.
Cited course lengths for Dichlorvos in dogs include: Single dose. Duration depends on the indication — match it to the specific dose rule in the table above.
Dichlorvos is indicated in dogs for: GI nematodes (obsolete).
These are general warnings for Dichlorvos across species; consult the dog dosing table above for species-specific guidance. Organophosphate toxicity risk. Do not combine with other cholinesterase inhibitors. Antidote: atropine + pralidoxime. Largely replaced by safer alternatives.
Why a species-specific page? Dichlorvos pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in dogs — 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.