Cat · Felis catus · typical adult weight 2.50–7.00 kg
Lactulose is dosed at 0.5–1 ml/kg PO q8-12h in cats, per Plumb's Veterinary Drug Handbook, 10th ed (2023, held copy; the original seed cited the 9th, which was never consulted) — Plumb's 10th ed (held) printed p.735, Lactulose monograph; page located 2026-08-05 from the book's own running heads, verified to name the drug in its body text. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207. Lactulose is used in cats for Constipation. Routes documented in cats: PO. A typical adult cat weighs 2.50–7.00 kg. ExoticRx lists 1 cited dose rule for Lactulose in cats, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Kristalose, Cephulac
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| PO | 0.5–1 ml/kg | q8-12h | Titrate to soft stool | Constipation | Strong | Plumb's Veterinary Drug Handbook, 10th ed (2023, held copy; the original seed cited the 9th, which was never consulted) — Plumb's 10th ed (held) printed p.735, Lactulose monograph; page located 2026-08-05 from the book's own running heads, verified to name the drug in its body text. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207 |
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These ranges are per kg. Enter your cat's weight to get the precise dose and draw-up volume — unit and concentration math done for you.
Synthetic disaccharide broken down by colonic bacteria to lactic, acetic, and formic acids. Osmotic effect draws water into colon. Acidifies colonic contents, converting ammonia to non-absorbable ammonium.
Dose to effect (soft stool). Excessive doses cause diarrhea, flatulence, cramping. Monitor electrolytes with chronic use. Essential in hepatic encephalopathy management.
Species-specific contraindications and adverse-reaction reports for cats may differ from canine / feline reference data — consult the primary citations listed with each rule.
Lactulose dose range in cats, with cited source references: PO 0.5–1 ml/kg q8-12h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Lactulose in cats: PO.
Cited course lengths for Lactulose in cats include: Titrate to soft stool. Duration depends on the indication — match it to the specific dose rule in the table above.
Lactulose is indicated in cats for: Constipation.
These are general warnings for Lactulose across species; consult the cat dosing table above for species-specific guidance. Dose to effect (soft stool). Excessive doses cause diarrhea, flatulence, cramping. Monitor electrolytes with chronic use. Essential in hepatic encephalopathy management.
Why a species-specific page? Lactulose 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.