Merck Manual

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Drugs for Intestinal Helminths of Cats Approved in the USA and UK

Drugs for Intestinal Helminths of Cats Approved in the USA and UK

Drug or Drug Combination

Dosage (mg/kg)

Route of Administration

Helminths Active Againsta

Approved only in USA

Epsiprantel

2.75

PO

Dipylidium caninum, Taenia taeniaeformis

Ivermectin

0.024

PO

Ancylostoma tubaeforme, A braziliense

Milbemycin oxime

2

PO

Toxocara cati, A tubaeforme

Piperazine (various salts)

48–88b, d

PO

T catic, Toxascaris leonina

Praziquantel

4.6–10

PO

D caninum, T taeniaeformis

5–10

SC, IM

D caninum, T taeniaeformis

Praziquantel + pyrantel pamoate

5/20

PO

T cati, A tubaeforme, D caninum, T taeniaeformis

Approved only in UK

Fenbendazole

50, daily for 3 days; 100

PO

T cati, T leonina, Ancylostoma spp, Uncinaria spp, Taenia spp

Praziquantel

5

PO

D caninum, T taeniaeformis, Echinococcus multilocularisc

8

Topical

D caninum, Taenia spp, E multilocularis

Milbemycin oxime + praziquantel

2/5

PO

T cati, A tubaeforme, D caninum, Taenia spp, E multilocularis

Praziquantel + pyrantel embonate

5/57.5

PO

T cati, T leonina, D caninum, T taeniaeformis

Approved in both USA and UK

Emodepside + praziquantel

3/12

Topical

T cati, A tubaeforme, D caninum, T taeniaeformis, T leoninad, E multilocularisd

Moxidectin + imidacloprid

1/10

Topical

T cati, A tubaeforme

Selamectin

6

Topical

T cati, A tubaeforme

a Many of these drugs are also approved for use against other types of parasites (eg, fleas, heartworms) not listed here.

b Repeat in 10–14 days for most products

c Only some products

d Only in the USA