Drugs Used to Treat Common Ectoparasites in Poultry

Active Ingredient / ProductCategoryDrug / Chemical ClassPrimary Parasite TargetsRoute(s) of AdministrationEgg Withdrawal Risk (qual.)Meat Withdrawal Risk (qual.)Use in Layers?U.S. Regulatory Status (summary)Dosage Recommendations Cited in Peer Reviewed Literature or Product LabelsLegend & compliance notes
For BYC education: treat any non-labeled parasiticide as a 'pet bird only' pathway unless you have a veterinarian and a defensible withdrawal plan.
Fluralaner oral solution (EXZOLT™)EctoparasiticideIsoxazolineNorthern fowl mites (Ornithonyssus sylviarum) and the Poultry Red Mite* (Dermanyssus gallinae) *EU label onlyOral (medicated drinking water; 2 doses per label)0-day egg withdrawal per label (USA & EU)USA: 11-day meat withdrawal. EU/UK: 14-day meat withdrawalYes (label includes laying hens)FDA-approved for treatment/control of northern fowl mites in chickens (approved 2025; label-specific)Dosage: 0.5 mg fluralaner per kg of body weight. Volume Equivalent: 0.05 mL of Exzolt solution per kg BW (or 0.023 mL per lb). Administered as (2) doses, seven (7) days apart.The first dose kills the adult mites feeding on the bird. The 7-day gap allows mite eggs in the environment to hatch, and the second dose kills those new larvae before they can reproduce, effectively breaking the life cycle.
Spinosad (Elector® PSP) **premises insecticide**Ectoparasiticide (premises)Spinosyn insecticideNorthern fowl mites; flies; darkling beetles (label-dependent)Premises spray (facility treatment; label-dependent). Approved for Direct Bird Application (Elector PSP label - Elanco)0-day egg withdrawal per label0-day meat withdrawal per labelLabel-dependentLabeled for use in/around poultry premises; verify label for applications and any restrictionsElector PSP is sold as a concentrated liquid that must be diluted. 9 mL per 1 Gallon (3.78 L) of water. Once mixed with water, the solution degrades within 24–48 hours.It is a fermentation product derived from the soil bacterium Saccharopolyspora spinosa.
Permethrin (garden/poultry dusts; sprays; commonly Gordon's, Martin's, ProZap, or GardStar) **insecticide**Ectoparasiticide (topical/premises)Synthetic pyrethroidLice; mites; some other ectoparasites (label-dependent)Typically available in two main forms for poultry: 10% Emulsifiable Concentrate (EC) (liquid) and 0.25% Dust (powder).0-day egg withdrawal per label0-day meat withdrawal per labelYes (label-dependent; many are used in layers with restrictions)Many permethrin products are labeled for poultry and poultry houses; verify specific labelLiquid concentrate dilution: 1 part concentrate to 100 parts water (approx. 1.28 oz per gallon or 38 mL per gallon). Dust: 1 lb of dust per 100 birds.Permethrin kills adults and nymphs but is generally NOT ovicidal (does not kill eggs). Widespread resistance exists in Northern Fowl Mites and Red Mites due to decades of use.
Pyrethrins (e.g., pyrethrum-based sprays; commonly EverGreen, PyGanic, or Southern Ag) **insecticide**Ectoparasiticide (topical/premises)Botanical pyrethrinsLice/mites (variable efficacy; label-dependent)Topical/premises spray (label-dependent)0-day egg withdrawal per label0-day meat withdrawal per labelYes (label-dependent; many are used in layers with restrictions)Some products are labeled for poultry premises; verify label directionsApprox. 1 to 1.5 fl oz per gallon of water. Approximately 1 gallon of diluted spray per 100 birds.Pyrethrins are natural extracts from chrysanthemum flowers, often combined with a synergist like piperonyl butoxide (PBO) to prevent insects from recovering. Many pyrethrin products (like PyGanic) are OMRI-listed for organic
Ivermectin (Ivomec® Pour-On, Noromectin® Pour-On)Endectocide (worms + mites) (off-label in poultry)Macrocyclic lactoneSome nematodes; some external parasites (mites/lice) (variable)Oral / topical / injectable (species products; poultry use off-label)12-week egg withdrawal (no U.S. poultry tolerance; residues a major concern)12-week meat withdrawalNo (U.S. food birds)Not approved for any poultry species in the U.S.; no tolerance for egg/meat residues0.2 mg/kg - 0.4 mg/kg (0.02 ml/lb - 0.04 ml/lb) Topical formulation, two doses 10-14 days apart applied to the skin at the base of the neck. One drop equals approximately 0.05 mlHighly liphylic (concentrates in fat tissue/egg yolk). Seek alternatives if possible.
Selamectin (Revolution®)Endectocide (pet-bird only; off-label)Macrocyclic lactoneMites/lice and some nematodes (species-dependent)TopicalVery high (food birds) 12 weeksVery high (food birds) 12 weeksNo (food birds)Not labeled for poultry food production; treat as non-food onlyTransdermal: 6 mg/kg to 18 mg/kg.Do not consume eggs from treated birds. If consumption is necessary, a "lifetime" withdrawal or a conservative 12 weeks is often suggested, but without data, safety cannot be guaranteed.
Fipronil (Frontline®) ILLEAGAL IN FOOD-PRODUCING ANIMALSEndectocide (pet-bird only; off-label)PhenylpyrazolesMites, Lice, Fleas.TopicalNO ESTABLISHED WITHDRAWAL (Lifetime Ban)NO ESTABLISHED WITHDRAWAL (Lifetime Ban)No (dog and cat only)BANNED in food-producing animals.Fipronil is not approved by the FDA or EMA for any food-producing animal. Its use in poultry is a violation of federal law in the US and EU.In 2017, a massive food safety scandal occurred in Europe when a pest control company illegally mixed fipronil into a "natural" mite treatment for chickens.
Eprinomectin (mammals; not for poultry food chain)Endectocide (mammals)Macrocyclic lactoneSome nematodes; some external parasites (mites/lice) (variable)Topical pour-on / injectable (mammal products)Very highVery highNoNot labeled for poultry; treat as non-food only if used in pet birds under veterinary directionStandard Cattle Dose: 0.5 mg/kgLike other pour-ons, efficacy is variable in ducks/geese due to waterproofing oils; injection or oral dosing (off-label) is sometimes preferred by vets.
Wettable sulfur powder(90% organic sulfar; commonly Yellow Jacket Wettable Sulfur, Hi-Yield Wettable Sulfur) **non-drug control**Non-drug ectoparasite control90% Sulfur powderSome mites/lice on skin/feathers (variable)Topical application/dust bath/use with caution - skin and eye irritant0-day egg withdrawal per label0-day meat withdrawal per labelYes (label includes laying hens)Non-drug topical; poultry suitability is product-specific and often not intended for birds, Approved for organic flocksMix 1 part sulfur to 9 parts sand/dirt/peat moss.The prevailing theory is that when sulfur dust contacts the bird's warm skin, it slowly converts into trace amounts of hydrogen sulfide gas or sulfur dioxide. This gas acts as a local fumigant in the feather layer, suffocating or poisoning the mites.
Food Grade Diatomaceous earth (DE) **non-drug control**Non-drug ectoparasite controlSilica-based desiccant dustExternal parasites (mites/lice) in environment; variable on-bird effectPremises dusting (environment)None (non-drug), but safety concerns if misusedNone (non-drug), but safety concerns if misusedYes (environmental use)Non-drug; product quality varies; not an FDA drug. (GRAS - Generally Recognized As Safe)Add 5-10% DE to the sand/dirt in a dust bath area. Keep dryRespiratory Risk: Wear a mask when applying. Avoid "clouds" of dust in the coop. Apply low to the ground or when birds are outside.
Dr. Blayne Mozisek

CEO & Founder of ThePoultryDoc, Inc