Veterinary Drug Handbook (VDH) is the reference veterinarians turn to when they want an independent source of information on the drugs that are used in veterinary medicine today.



a) 26.4 - 33 mg/kg PO (Papich 1992)
b) Adults: 27 - 33 mg/kg; Puppies: 11 mg/kg (Sherding and Johnson 1994a)


a) 11 mg/kg PO (Papich 1992), (Sherding and Johnson 1994a)
Pocket Pets:
Including rats, gerbils, mice, Guinea pig, hamsters, chinchillas for fleas/lice: Hang 5 cm of adichlorvos strip 6 inches above cage for 24 hours, twice weekly for 3 weeks. (Anderson1994)
Large Animals:
Read and follow label directions, including any withdrawal times stated.
Monitoring Parameters - 1) Efficacy; 2) Adverse Effects
Client Information - Keep out of reach of children. Handling of dichlorvos liquid preparations(e.g., premise spray) must be done with extreme care; follow all label directions! Oral pellets arenon-digestible and may be seen in the animals feces.
Dosage Forms/Preparations/FDA Approval Status/Withholding Times - Veterinary-Approved Products:
Dichlorvos Oral: Tablets 10 mg, 20 mg; Capsules 68 mg, 136 mg, 204 mg; Pellets (inpackets) 136 mg, 204 mg, 544 mg; Task® & Task® Tabs (Fermenta); (Rx). Approved foruse in dogs (Capsules, Pellets and Tabs) and cats (Tabs Only).
Dichlorvos Oral Equine Wormer 78 g/pkt; Cutter Dichlorvos Horse Wormer® (Miles);(OTC)
Dichlorvos Feed Additives: Atgard® C (Fermenta); (OTC); Atgard® Swine Wormer(Fermenta); (OTC)
Also available in a 9.6% flea and tick collar for dogs and cats: Pet Insecticide Collar(Fermenta); (OTC) and a 40.2% concentrate for premise spraying in 5 gallon containers:
Vapona® Concentrate (Fermenta); (OTC).
Human-Approved Products: None
For general information on the penicillins, including adverse effects, contraindications, overdosage, drug interactions and monitoring parameters, refer to the monograph: Penicillins, General