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Systematic (IUPAC) name
Clinical data
AHFS/ International Drug Names
Routes of
Injection, Topical and Oral
Legal status
Legal status
  • Veterinary use only
CAS Number 117704-25-3
ATCvet code QP54AA03 (WHO)
PubChem CID 9832750
ChemSpider 8008478 YesY
KEGG D01129 YesY
Chemical data
Formula C50H74O14
Molar mass 899.114

Doramectin (Dectomax) is a veterinary drug approved by the Food and Drug Administration (FDA) for the treatment of parasites such as gastrointestinal roundworms, lungworms, eyeworms, grubs, sucking lice and mange mites in cattle.[1]

It is used for the treatment and control of internal parasitosis (gastrointestinal and pulmonary nematodes), ticks and mange (and other ectoparasites). Doramectin is a derivative of ivermectin. Its spectrum includes: Haemonchus spp., Ostertagia spp., Trichostrongylus spp., Cooperia spp., Oesophagostomum spp., Dictyocaulus viviparus, Dermatobia hominis, Boophilus microplus, Psoroptes bovis, among many other internal and external parasites. It is available in 2 dosage forms: as an injection and as a 5 mg/ml topical solution.

Doramectin is also marketed in many Latin-American and some Asia and Africa countries as Doramec L.A. (manufactured by Agrovet Market Animal Health[2]) in an 1% Doramectin Long Acting Injectable Solution for cattle, sheep, swine[3] and others. Its oleous carrier confers to Doramec L.A. a slow and prolonged liberation, extending its action up to 42 days.

Doramectin is also available for horses[3] as an oral flavored bioadhesive gel under the name Doraquest L.A. Oral Gel.[4] It can be used to control and treat internal parasites as roundworms, lungworms and some external parasites.


  1. ^ Pfizer Animal Health. "DECTOMAX Injectable." Last accessed July 14, 2007.
  2. ^ Agrovet Market Animal Health-Doramec L.A.
  3. ^ a b Agrovet Market Animal Health
  4. ^ Agrovet Market Animal Health-Doraquest L.A. Oral Gel