Merck Manual

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Parasiticides Used in Reptiles

Parasiticides Used in Reptiles

Drug

Dosage

Parasite

Comments

Vice-presidents

Fenbendazole

25–100 mg/kg, PO, every 14 days for up to 4 treatments

50 mg/kg/day, PO, for 3–5 days

Roundworms, Hexamita

Can cause leukopenia

Ivermectin

200 mcg/kg, PO, IM, SC, repeat after 14 days

Not in chelonians; care in skinks and indigo snakes

Levamisole

5–10 mg/kg, SC, intracoelomic, repeat after 14 days

Lungworms and other nematodes

Snakes, lizards, care in tortoises (use 5 mg/kg)

Mebendazole

20–25 mg/kg, PO, repeat after 14 days

Strongyles and ascarids

Metronidazole

20–40 mg/kg, PO, every 1–2 days for 2–5 treatments

Protozoa

Oxfendazole

25 mg/kg, PO, as a single dose

Nematodes

Paromomycin

Most species: 35–100 mg/kg/day, PO, for 28 days

Snakes: 100 mg/kg, PO, every day for 7 days, then twice weekly for 3 months

Gila monsters: 300–360 mg/kg, PO, every 2 days for 14 days

Geckos: 300–800 mg/kg, PO, every day

Amoebas, cryptosporidia

Does not eliminate cryptosporidia

Ponazuril

Bearded dragons: 30 mg/kg, PO, every 2 days for two treatments

Coccidiosis

Praziquantel

8 mg/kg, PO, SC, IM, repeat after 14 days and 28 days

Tapeworms, flukes

Pyrantel

Most species: 5 mg/kg, PO, repeat in 14 days

Chameleons: 5–10 mg/kg, PO, every 14 days

Sea turtles: 25–50 mg/kg, PO, every 3 days for 3 treatments

Nematodes

Spirorchidiasis

Spiramycin

160 mg/kg/day for 10 days, then twice weekly for 3 months

Snakes with cryptosporidiosis

May reduce clinical signs but does not clear infection

Toltrazuril

5–15 mg/kg/day, PO, for 3 days

15 mg/kg, every 48 hours for 10 days; discontinue for 2 weeks; repeat every 48 hours for 10 days, and repeat as necessary

Bearded dragons, coccidiosis

Tortoises, intranuclear coccidiosis

Safety, efficacy, and pharmacokinetic data lacking

Trimethoprim-sulfa

30 mg/kg/day, PO, for 10–28 days

Coccidia

Ectoparasiticides

Dichlorvos-impregnated strip

6 mm strip/10 cubic feet in cage for 3 hours every 2 days for 2–4 weeks

Toxic, vivarium should be emptied; keep out of direct contact of animals

Fipronil

Spray or wipe on, then wash off in 5 minutes, every 7–10 days

Mites and ticks, beware of reactions to alcohol carrier, needs safety evaluation

Ivermectin (10 mg/mL)

By spraying, 5–10mg/L water every 3–5 days up to 28 days

Mites and ticks

Should not be used in chelonians; use care in skinks and indigo snakes

Permethrin (10%)

Topical spray for animal and environment

Mites and ticks, FDA-approved

Licensed product available for reptiles in the USA