What is Toltrazuril used for?

Toltrazuril is indicated for: Atoxoplasma spp., Atoxoplasmosis, Coccidia, Coccidia (Eimeria, Isospora), Coccidiosis, Coccidiosis (flock/loft treatment), Coccidiosis (Isospora), Coccidiosis (oocyst shedding suppression), Coccidiosis in kids, Coccidiosis in piglets, Coccidiosis in piglets (Isospora suis), Coccidiosis metaphylaxis in calves up to 80 kg on farms, E. ovinoidalis - not, Intestinal coccidiosis, Prevention of coccidiosis in lambs on farms, Toxoplasmosis (combination therapy component).

Which species have cited Toltrazuril dosing data?

Toltrazuril dosing in the ExoticRx formulary covers 24 species: African Grey Parrot, African Pygmy Hedgehog, Bearded Dragon, Betta (Siamese fighting fish), Canary, Cattle (Beef/Dairy), Chinchilla, Cockatiel, Degu, Dog (Domestic), Domestic Pigeon, Dwarf Hamster, Goat (Caprine), Goldfish, Guinea Pig, Koi, Mouse, Pet Rat, Rabbit (Domestic), Sheep (Ovine), Sugar Glider, Swine (Pig), Syrian Hamster, Zebra Finch.

Is Toltrazuril a controlled substance?

Toltrazuril is not federally scheduled in the US. Controlled-drug status differs by country — verify your local rules.

What are the warnings or contraindications for Toltrazuril?

Generally well-tolerated. Primarily used for coccidiosis. Single-dose or short-course treatment. Bitter taste. Extra-label use in small animals.

What are the side effects of Toltrazuril?

Reported side effects, adverse reactions, and contraindications for Toltrazuril: Generally well-tolerated. Primarily used for coccidiosis. Single-dose or short-course treatment. Bitter taste. Extra-label use in small animals.

How does Toltrazuril work?

Disrupts mitochondrial function and nuclear division in all intracellular stages of coccidia. Coccidiocidal rather than coccidiostatic.

Toltrazuril

US brand names:Baycox

Calculate dosage

Sourced from published veterinary references. Awaiting credentialed clinical reviewer — our editorial process.

Toltrazuril is dosed at 5–15 mg/kg PO q24h in bearded dragons, per 73. Doneley B. Caring for the bearded dragon. Proc North Am Vet Conf. 2006;1607-1611. — Source: Mader's Reptile and Amphibian Medicine and Surgery, 3rd Ed, p.1407 — SOURCE EDITION: Mader's Reptile and Amphibian Medicine and Surgery (Divers & Stahl) — ISBN 9780323482530, https://openlibrary.org/isbn/9780323482530. Verify against current literature before clinical use.

Drug Class

Antiparasitic

Routes

Indications

Atoxoplasma spp.AtoxoplasmosisCoccidia Coccidia (Eimeria, Isospora)

Backed by 23 published sources

· 168. Visser C, Wijnbergen A, Bleich A. Maeuse und Ratten. In: Fehr M, Sassenburg L, Zwart P, eds. Krankheiten der Heimtiere, Schluetersche Verlagsgesellschaft, Hannover, Germany; 2015. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.781 — Carpenter's Exotic Animal Formulary 6th ed, Table 9.2 (Antiparasitic Agents Used in Rodents). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929
· 232. Doneley B. Formulary. In: Doneley B, eds. Avian Medicine and Surgery in Practice: Companion and Aviary Birds; Manson Publishing, London, UK; 2011:285-320. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.444 — Carpenter's Exotic Animal Formulary 6th ed, Table 5.4 (Antiparasitic Agents Used in Birds). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

Sample dosing (1 of 28 cited rules)

A dog/cat sample is shown here. Cited dosing for all 24 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	10–30 mg/kg	Single dose or q24h x 3 days	Moderate	Companion Animal Parasite Council (CAPC). Coccidia. https://capcvet.org/guidelines/coccidia/. Accessed on 4/18/22.; Daugschies A, Mundt HC, Letkova V. Toltrazuril treatment of cystoisosporosis in dogs under experimental and field conditions. Parasitol Res. 2000;86(10):797-799. doi:10.1007/s004360000217 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.1283 (2026-08-01). — Plumb's 10th ed (held) printed p.1256, Toltrazuril monograph spanning p.1255-1256; page located 2026-08-05 from the book's own running heads, and carries this exact dose under the matching species heading. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207

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30. Jepson L. Hedgehogs. In: Jepson L, eds. Exotic Animal Medicine: A Quick Reference Guide, 2nd ed., Elsevier, St. Louis, MO; 2016:198-230. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.738 — Carpenter's Exotic Animal Formulary 6th ed, Table 8.3 (Antiparasitic Agents Used in Hedgehogs). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

· 381. Harper FD.W. Poor performance and weight loss. In: Beynon PH, Forbes NA, Harcourt-Brown NH, eds. BSAVA Manual of Raptors, Pigeons and Waterfowl; Iowa State University Press, Ames, IA; 1996:272-278. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.445 — Carpenter's Exotic Animal Formulary 6th ed, Table 5.4 (Antiparasitic Agents Used in Birds). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: BSAVA Small Animal Formulary, Part A — Canine and Feline — ISBN 9781910443705, https://openlibrary.org/isbn/9781910443705; Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

· 46. Ewringmann A, Gloeckner B. Leitsymptome bei Meerschweinchen, Chinchilla und Degu, Enke, Stuttgart, Germany; 2012. | 152. Sassenburg L. Degu. In: Fehr M, Sassenburg L, Zwart P, eds. Krankheiten der Heimtiere, Schluetersche Verlagsgesellschaft, Hannover, Germany; 2015. | 168. Visser C, Wijnbergen A, Bleich A. Maeuse und Ratten. In: Fehr M, Sassenburg L, Zwart P, eds. Krankheiten der Heimtiere, Schluetersche Verlagsgesellschaft, Hannover, Germany; 2015. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.780 — Carpenter's Exotic Animal Formulary 6th ed, Table 9.2 (Antiparasitic Agents Used in Rodents). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

· 46. Ewringmann A, Gloeckner B. Leitsymptome bei Meerschweinchen, Chinchilla und Degu, Enke, Stuttgart, Germany; 2012.; 152. Sassenburg L. Degu. In: Fehr M, Sassenburg L, Zwart P, eds. Krankheiten der Heimtiere, Schluetersche Verlagsgesellschaft, Hannover, Germany; 2015.; 168. Visser C, Wijnbergen A, Bleich A. Maeuse und ratten. In: Fehr M, Sassenburg L, Zwart P, eds. Krankheiten der Heimtiere, Schluetersche Verlagsgesellschaft, Hannover, Germany; 2015. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.780 — Carpenter's Exotic Animal Formulary 6th ed, Table 9.2 (Antiparasitic Agents Used in Rodents). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

· 545. Lohr JE, Haberkorn A. Efficacy of toltrazuril against natural infections with intestinal coccidia in aviary birds. Praktische-Tierarzt. 1998;79:419-422. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.445 — Carpenter's Exotic Animal Formulary 6th ed, Table 5.4 (Antiparasitic Agents Used in Birds). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

· 73. Doneley B. Caring for the bearded dragon. Proc North Am Vet Conf. 2006;1607-1611. — Source: Mader's Reptile and Amphibian Medicine and Surgery, 3rd Ed, p.1407 — SOURCE EDITION: Mader's Reptile and Amphibian Medicine and Surgery (Divers & Stahl) — ISBN 9780323482530, https://openlibrary.org/isbn/9780323482530

· 964. Vercruysse J. Efficacy of toltrazuril and clazuril against experimental infections with Eimeria labbeana and E. columbarum in racing pigeons. Avian Dis. 1990;34:73-79. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.445 doi:10.2307/1591336 — Carpenter's Exotic Animal Formulary 6th ed, Table 5.4 (Antiparasitic Agents Used in Birds). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

· BAYCOX - Toltrazuril Oral Suspension [Canadian Product Label for Calves, Piglets, Lambs]. Elanco Canada Limited; 2020. — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.1283 (2026-08-01). — Plumb's 10th ed (held) printed p.1256, Toltrazuril monograph spanning p.1255-1256; page located 2026-08-05 from the book's own running heads, and carries this exact dose under the matching species heading. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207

· BAYCOX MULTI 50 Mg/ML Oral Suspension for Cattle, Pigs, and Sheep [UK Datasheet]. Elanco UK AH Limited; 2020. — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.1283 (2026-08-01). — Plumb's 10th ed (held) printed p.1256, Toltrazuril monograph spanning p.1255-1256; page located 2026-08-05 from the book's own running heads, and carries this exact dose under the matching species heading. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207

· Carpenter's Exotic Animal Formulary, 6th Ed. | Open-access corroboration 2026-07-21: PMC7129257 — Clinical Management of Avian Renal Disease, VCNA Exot Anim Pract (PMC7129257). avian coccidiosis; supports the 25 mg/kg PO upper bound. CAVEAT: source interval is once weekly vs DB q24h x2-3d. — Carpenter's Exotic Animal Formulary, 6th ed, Table 5.4 (corpus PDF pp.430-433); located 2026-08-06 by chapter-governed table: this table is in the chapter covering this species and names this drug. NOTE: the served figure was matched against the table as a whole, not against this drug's own row, so confirm the number on the page before relying on it. The held copy has no printed page numbers, so the numbered table is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

· Companion Animal Parasite Council (CAPC). Coccidia. https://capcvet.org/guidelines/coccidia/. Accessed on 4/18/22.; Daugschies A, Mundt HC, Letkova V. Toltrazuril treatment of cystoisosporosis in dogs under experimental and field conditions. Parasitol Res. 2000;86(10):797-799. doi:10.1007/s004360000217 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.1283 (2026-08-01). — Plumb's 10th ed (held) printed p.1256, Toltrazuril monograph spanning p.1255-1256; page located 2026-08-05 from the book's own running heads, and carries this exact dose under the matching species heading. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207

· Doneley B. Formulary. In: Doneley B, eds. Avian Medicine and Surgery in Practice: Companion and Aviary Birds; Manson Publishing, London, UK; 2011:285- 320. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.445 — Carpenter's Exotic Animal Formulary 6th ed, Table 5.4 (Antiparasitic Agents Used in Birds). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

· Ewringmann A, Gloeckner B. Leitsymptome bei Meerschweinchen, Chinchilla und Degu, Enke, Stuttgart, Germany; 2012. / Sassenburg L. Degu. In: Fehr M, Sassenburg L, Zwart P, eds. Krankheiten der Heimtiere, Schluetersche Verlagsgesellschaft, Hannover, Germany; 2015. / Visser C, Wijnbergen A, Bleich A. Maeuse und ratten. In: Fehr M, Sassenburg L, Zwart P, eds. Krankheiten der Heimtiere, Schluetersche Verlagsgesellschaft, Hannover, Germany; 2015. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.780 — Carpenter's Exotic Animal Formulary 6th ed, Table 9.2 (Antiparasitic Agents Used in Rodents). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

· Ewringmann A, Gloeckner B. Leitsymptome bei Meerschweinchen, Chinchilla und Degu, Enke, Stuttgart, Germany; 2012. | Sassenburg L. Degu. In: Fehr M, Sassenburg L, Zwart P, eds. Krankheiten der Heimtiere, Schluetersche Verlagsgesellschaft, Hannover, Germany; 2015. | Visser C, Wijnbergen A, Bleich A. Maeuse und ratten. In: Fehr M, Sassenburg L, Zwart P, eds. Krankheiten der Heimtiere, Schluetersche Verlagsgesellschaft, Hannover, Germany; 2015. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.780 doi:10.1055/b-004-129947 — Carpenter's Exotic Animal Formulary 6th ed, Table 9.2 (Antiparasitic Agents Used in Rodents). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

· Ewringmann A, Gloeckner B. Leitsymptome bei Meerschweinchen, Chinchilla und Degu, Enke, Stuttgart, Germany; 2012. | Sassenburg L. Degu. In: Fehr M, Sassenburg L, Zwart P, eds. Krankheiten der Heimtiere, Schluetersche Verlagsgesellschaft, Hannover, Germany; 2015. | Visser C, Wijnbergen A, Bleich A. Maeuse und ratten. In: Fehr M, Sassenburg L, Zwart P, eds. Krankheiten der Heimtiere, Schluetersche Verlagsgesellschaft, Hannover, Germany; 2015. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.780 — Carpenter's Exotic Animal Formulary 6th ed, Table 9.2 (Antiparasitic Agents Used in Rodents). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

· Ewringmann A, Gloeckner B. Leitsymptome bei Meerschweinchen, Chinchilla und Degu, Enke, Stuttgart, Germany; 2012. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.780 — Carpenter's Exotic Animal Formulary 6th ed, Table 9.2 (Antiparasitic Agents Used in Rodents). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

· FARAD Withdrawal Guidelines — dose corroborated 2026-08-05 in Plumb's Veterinary Drug Handbook 10th ed (held), Toltrazuril monograph, printed p.1255. NOTE: FARAD publishes meat/milk WITHDRAWAL intervals for extralabel use; it is not the source of the dose itself, so the dose is cited to Plumb's and FARAD retained for the withdrawal guidance. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207

· Jepson L. Sugar gliders. In: Jepson L, eds. Exotic Animal Medicine: A Quick Reference Guide, 2nd ed., Elsevier, St. Louis, MO; 2016:231-257. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.707 — Carpenter's Exotic Animal Formulary 6th ed, Table 7.2 (Antiparasitic Agents Used in Sugar Gliders). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

· Plumb's Veterinary Drug Handbook, 10th ed (2023, held copy; the original seed cited the 9th, which was never consulted) | Redrobe S, Gakos G, Elliot SC, et al. Comparison of toltrazuril and sulphadimethoxine in the treatment of intestinal coccidiosis in pet rabbits. Vet Rec. 2010;167:287-290. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.852 — Plumb's 10th ed (held) printed p.1257, Toltrazuril monograph spanning p.1257-1256; page located 2026-08-05 from the book's own running heads, verified to name the drug in its body text. — Carpenter's Exotic Animal Formulary 6th ed, Table 10.3 (Antiparasitic Agents Used in Rabbits.a). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207; Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

· Ramsey I, ed. BSAVA Small Animal Formulary, 10th ed. Part B: Exotic Pets. Gloucester: British Small Animal Veterinary Association; 2023. p.299. — LOCATOR CONVENTION 2026-08-07: the bare 'p.299' in this citation is the PDF index of the held scan, not the printed page. The PRINTED page is p.285; verified by finding the drug named there. If you are holding the book, turn to p.285. — SOURCE EDITION: BSAVA Small Animal Formulary, Part B — Exotic Pets — ISBN 9781910443712, https://openlibrary.org/isbn/9781910443712

· Visser C, Wijnbergen A, Bleich A. Maeuse und Ratten. In: Fehr M, Sassenburg L, Zwart P, eds. Krankheiten der Heimtiere, Schluetersche Verlagsgesellschaft, Hannover, Germany; 2015. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.781 — Carpenter's Exotic Animal Formulary 6th ed, Table 9.2 (Antiparasitic Agents Used in Rodents). The copy held is an ebook conversion with no printed page numbers, so the table — not the page — is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

Toltrazuril

Drug Class

Routes

Indications

Mechanism of Action

Side effects & warnings

Species with Toltrazuril dosing data (28 dose rules)

Evidence levels across 28 dose rules

Backed by 23 published sources

Sample dosing (1 of 28 cited rules)

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Toltrazuril

Drug Class

Routes

Indications

Mechanism of Action

Side effects & warnings

Species with Toltrazuril dosing data (28 dose rules)

Evidence levels across 28 dose rules

Backed by 23 published sources

Sample dosing (1 of 28 cited rules)

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Articles mentioning Toltrazuril

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