Tri-Heart Plus (Schering-Plough Animal Health) chewable tablets contain ivermectin and pyrantel for dogs 6 weeks and older.
The tablets are given monthly to prevent canine heartworm disease by eliminating the tissue stage of Dirofilaria immitis larvae for 30 days after infection and to treat and control infections with the ascarids Toxocara canis and Toxascaris leonina and the hookworms Ancylostoma caninum, Uncinaria stenocephala, and Ancylostoma braziliense. Dogs should be tested for heartworm disease before administration. Some dogs of the collie breed are sensitive to ivermectin
at more than 16 times the target use level. Ivermectin and pyrantel have a wide margin of safety at the recommended dose level
in pregnant and breeding bitches as well as in stud dogs. The tablets are available in three sizes for dogs.
Vectra 3D (Summit VetPharm) contains dinotefuran (4.95%), pyriproxyfen (0.44%), and permethrin (36.08%). It is a topical product
used to repel and kill fleas, ticks, and mosquitoes for at least one month. It protects against all stages of fleas, four
types of ticks (Rhipicephalus species, Dermacentor variabilis, Ixodes scapularis, and Amblyomma maculatum), and three types of mosquitoes (Culex, Ochlerotatus, and Aedes species) for at least one month. This product remains effective after bathing and swimming and can be used only on dogs and
puppies more than 7 weeks old. Do not use on cats. Also do not use on dogs that are debilitated, aged, medicated, pregnant,
or nursing or dogs that are sensitive to pesticide products without consulting with a veterinarian first. Vectra 3D is available
in four sizes for dogs.
Virbac Long Acting Knockout Spray
Virbac Long Acting Knockout Spray (Virbac Animal Health) contains permethrin (2%) and pyriproxyfen (0.05%) to kill fleas for
two months and ticks for one month and sterilize fleas for three months. The spray should not be used on cats. It should only
be used on dogs 6 months or older and no more often than once a month. Consultation with a veterinarian is required before
using the product on debilitated, aged, medicated, pregnant, or nursing animals.
Virbac Pyrethrin Dip
Virbac Pyrethrin Dip (Virbac Animal Health) contains pyrethrins (1%), piperonyl butoxide (4%), n-octyl bicycloheptene dicarboximide
(6%), and di-n-propyl isocinchomeronate (4%) to kill and repel fleas, ticks, lice, gnats, mosquitoes, and flies on dogs, puppies,
cats, and kittens. It should applied no more than once every seven days and should not be used on animals less than 12 weeks
of age. Consultation with a veterinarian is required before use on debilitated, aged, medicated, pregnant, or nursing animals.
The dip is toxic to fish. The dip must be diluted in warm water per the label directions before application.
Virbantel Flavored Chewables
Virbantel Flavored Chewables (Virbac Animal Health) contain pyrantel pamoate and praziquantel to treat and control infections
with the roundworms Toxocara canis and Toxascaris leonina; the hookworms Ancylostoma caninum, Ancylostoma braziliense, and Uncinaria stenocephala; and the tapeworms Dipylidium caninum and Taenia pisiformis. The product is safe for use in puppies 12 weeks and older and adult dogs. Safety in breeding dogs or pregnant bitches has
not been tested. The chewables come in two sizes.
The Veterinary Medicine editors thank Jan Grace, RVT, BBA, MSM, for her work in compiling the information for this supplement, as well as Patricia
Payne, DVM, PhD, for her assistance.