What is Oxfendazole used for?

Oxfendazole is indicated for: ascarids, GI nematodes, lungworms, Nematode infections, Nematodes, Oxyurid (pinworm) infections, Oxyurid (pinworm) nematodiasis, Oxyurid nematodes, Oxyurids, pinworms, Strongyles.

Which species have cited Oxfendazole dosing data?

Oxfendazole dosing in the ExoticRx formulary covers 13 species: African Clawed Frog, African Grey Parrot, Axolotl, Bearded Dragon, Cattle (Beef/Dairy), Fire Salamander, Green Iguana, Horse (Equine), Houston Toad, Russian Tortoise, Sulcata Tortoise, White's Tree Frog, Zebra Finch.

Is Oxfendazole a controlled substance?

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

What are the warnings or contraindications for Oxfendazole?

Wide safety margin. Teratogenic potential. Used in cattle, horses, and exotic species. Efficacy against some resistant nematode populations declining.

What are the side effects of Oxfendazole?

Reported side effects, adverse reactions, and contraindications for Oxfendazole: Wide safety margin. Teratogenic potential. Used in cattle, horses, and exotic species. Efficacy against some resistant nematode populations declining.

How does Oxfendazole work?

Active metabolite of febantel; inhibits microtubule polymerization by binding parasite beta-tubulin. Broad-spectrum nematocidal.

Oxfendazole

US brand names:Synanthic, Benzelmin

Calculate dosage

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

Oxfendazole is dosed at 25 mg/kg PO PO once in bearded dragons, per Carpenter's Exotic Animal Formulary, 6th Ed — Carpenter's Exotic Animal Formulary 6th ed, Table 4.4 (Antiparasitic Agents Used in Reptiles). Located 2026-08-05: the only table covering this species in which the drug's own row prints this dose. The copy held is an ebook conversion with no printed page numbers, so the table is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929. Verify against current literature before clinical use.

Drug Class

Antiparasitic

Routes

Indications

ascarids

Backed by 9 published sources

· 151. Giannetto S, Brianti E, Poglayen G, et al. Efficacy of oxfendazole and fenbendazole against tortoise (Testudo hermanni) oxyurids. Parasitol Res. 2007;100:1069-1073. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.228 doi:10.1007/s00436-006-0361-2 — Carpenter's Exotic Animal Formulary 6th ed, Table 4.4 (Antiparasitic Agents Used in Reptiles). 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
· 895. Steinhort LA. Diagnosis and treatment of common diseases of finches. In: Bongaura JD, eds. Kirk’s Current Veterinary Therapy XIII; Saunders, Philadelphia, PA; 2000:1119-1123. | 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. | 578. Marshall R. Avian anthelmintics and antiprotozoals. Semin Avian Exot Pet Med. 1993;2:33-41. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.438 — 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,

· Carpenter's Exotic Animal Formulary, 6th Ed — Carpenter's Exotic Animal Formulary 6th ed, Table 4.4 (Antiparasitic Agents Used in Reptiles). Located 2026-08-05: the only table covering this species in which the drug's own row prints this dose. The copy held is an ebook conversion with no printed page numbers, so the table is the citable location. — SOURCE EDITION: Carpenter's Exotic Animal Formulary — ISBN 9780323833929, https://openlibrary.org/isbn/9780323833929

· Doneley B. Formulary. In: Doneley B, eds. Avian Medicine and Surgery in Practice: Companion and Aviary Birds; Manson Publishing, London, UK; 2011:285-320. / 578. Marshall R. Avian anthelmintics and antiprotozoals. Semin Avian Exot Pet Med. 1993;2:33-41. / 895. Steinhort LA. Diagnosis and treatment of common diseases of finches. In: Bongaura JD, eds. Kirk's Current Veterinary Therapy XIII; Saunders, Philadelphia, PA; 2000:1119-1123. — Verified against Carpenter's Exotic Animal Formulary, 6th Ed, p.438 (2026-08-01). — 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

· Giannetto S, Brianti E, Poglayen G, et al. Efficacy of oxfendazole and fenbendazole against tortoise (Testudo hermanni) oxyurids. Parasitol Res. 2007;100:1069-1073. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.228 — Carpenter's Exotic Animal Formulary 6th ed, Table 4.4 (Antiparasitic Agents Used in Reptiles). 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

· Kehoe S, Divers S, Mayer J, et al. Efficacy of single-dose oxfendazole to treat oxyurid nematodiasis in the green iguana (Iguana iguana). J Herp Med Surg. 2020;30(3):137-141. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.228 doi:10.5818/19-06-203.1 — Carpenter's Exotic Animal Formulary 6th ed, Table 4.4 (Antiparasitic Agents Used in Reptiles). 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

· Ramsey I, ed. BSAVA Small Animal Formulary, 10th ed. Part B: Exotic Pets. Gloucester: British Small Animal Veterinary Association; 2023. p.234. — LOCATOR CONVENTION 2026-08-07: the bare 'p.234' in this citation is the PDF index of the held scan, not the printed page. The PRINTED page is p.220; verified by finding the drug named there. If you are holding the book, turn to p.220. — SOURCE EDITION: BSAVA Small Animal Formulary, Part B — Exotic Pets — ISBN 9781910443712, https://openlibrary.org/isbn/9781910443712

· Roberson EL. Antinematodal agents. In: Veterinary Pharmacology and Therapeutics. Iowa State University Press; 1988:882-927. — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.993 (2026-08-01). — Plumb's 10th ed (held) printed p.966, Oxfendazole monograph; 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; Veterinary Pharmacology and Therapeutics — ISBN 9781118855829, https://openlibrary.org/isbn/9781118855829

· SYNANTHIC BOVINE DEWORMER- Oxfendazole Suspension [Product Label]. Boehringer Ingelheim Animal Health USA Inc.; 2019. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=152cde64-ff22-4a3e-bb78-65e159dbe6b6 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.993 (2026-08-01). — Plumb's 10th ed (held) printed p.966, Oxfendazole monograph; page located 2026-08-05 from the book's own running heads, and carries this exact dose under the matching species heading. — 21 CFR § 520.1630 (Oxfendazole suspension), conditions of use for Cattle: 4.5-4.5 mg/kg. Retrieved from the eCFR API, snapshot 2026-01-01. https://www.ecfr.gov/current/title-21/section-520.1630 — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207

Oxfendazole

Drug Class

Routes

Indications

Mechanism of Action

Side effects & warnings

Species with Oxfendazole dosing data (13 dose rules)

Evidence levels across 13 dose rules

Backed by 9 published sources

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Oxfendazole

Drug Class

Routes

Indications

Mechanism of Action

Side effects & warnings

Species with Oxfendazole dosing data (13 dose rules)

Evidence levels across 13 dose rules

Backed by 9 published sources

Upgrade for Full Details

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