ExoticRx · exoticrx.com/drugs/dextromethorphan
US brand names:Robitussin DM(veterinary)
Dextromethorphan is dosed at 1–2 mg/kg PO q6-8h in dogs, per Verified against Papich/Saunders Handbook of Veterinary Drugs, 4th Ed, p.254 (2026-08-01).. Verify against current literature before clinical use.
Suppresses cough reflex by acting on the cough center in the medulla. NMDA receptor antagonist at higher doses.
OTC availability. Limited efficacy in veterinary patients. Ensure product does not contain xylitol, acetaminophen, or pseudoephedrine. Serotonin syndrome risk with other serotonergic drugs.
Species references:All Dog (Domestic) drugs
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A dog/cat sample is shown here. Cited dosing for all 1 species — reptiles, birds, pocket pets, livestock, and equine — is free on the per-species pages above. Pro adds the weight-based calculator for every species.
| Species | Route | Dose | Frequency | Evidence | Source |
|---|---|---|---|---|---|
| Dog (Domestic) | PO | 1–2 mg/kg | q6-8h | Weak | Verified against Papich/Saunders Handbook of Veterinary Drugs, 4th Ed, p.254 (2026-08-01). |
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View PlansSource citations and evidence levels available on the live page. Reference only — verify against current literature before clinical use.