Highy effective and safe for even the most stubborn cases

A strong, yet gentle solution for severe cases of otitis externa in dogs.


Posatex® Otic Suspension is indicated for the treatment of otitis externa in dogs associated with susceptible strains of yeast (Malassezia pachydermatis) and bacteria (coagulase-positive staphylococci, Pseudomonas aeruginosa, and Enterococcus faecalis).


POSATEX Otic Suspension is available in 7.5 g, 15 g, and 30 g plastic bottles.

Features & Benefits

Triple-action, once-a-day treatment for 7 days for even the most stubborn cases associated with susceptible strains of yeast and bacteria in canines.



Effective against a wide variety of Gram-negative and Gram-positive bacteria, including:1 Pseudomonas aeruginosa, coagulase-positive staphylococci, and Enterococcus faecalis


Mometasone furoate monohydrate

An effective corticosteroid that rapidly reduces discomfort, erythema, and swelling1

Rapidly controls inflammation without adrenocortical suppression2



Highly effective and safe for even the most stubborn cases

Provides potent, broad-spectrum efficacy, including against Malassezia pachydermatis1


POSATEX gets strong performance scores from veterinarians, even on the toughest, most chronic cases of otitis externa.


  • POSATEX treatment success rated as excellent in 50% OF ALL CASES.3
  • In comparison, veterinarians gave prior treatment an “excellent” score in only 10% of all cases.

Performance is consistent regardless of primary factors.3

Treat otitis externa the first time.

Veterinarians use POSATEX most often to treat recurrent otitis externa and cases with heavy
Malassezia infection, and they report excellent treatment results with Posatex.3



Each gram of POSATEX Otic Suspension contains 10 mg of orbifloxacin; mometasone furoate monohydrate equivalent to 1 mg mometasone furoate; and 1 mg of posaconazole in a mineral oil-based system containing a plasticized hydrocarbon gel.

Administration and Dosage

  • Adminster once daily for 7 days — Helps ensure pet parent compliance to treatment
  • 4 drops per ear for dogs less than 30 lbs
  • 8 drops per ear for dogs equal to or greater than 30 lbs


Posatex® is contraindicated in dogs with known or suspected hypersensitivity to quinolones, mometasone furoate monohydrate, or posaconazole. Do not use in dogs with known tympanic perforation. The safe use in dogs used for breeding purposes, during pregnancy or in lactating bitches, has not been evaluated.

For additional information, please see the product label.


  1. Posatex® Otic Suspension [Orbifloxacin, Mometasone Furoate Monohydrate and Posaconazole] [Product Information]. Madison, NJ: Intervet Inc.; 2019.
  2. Reeder CJ, Griffin CE, Polissar NL, et al. Comparative adrenocortical suppression in dogs with otitis externa following topical otic administration of four different corticosteroid-containing medications. Vet Ther. 2008;9:111-121.
  3. Data on file, Merck Animal Health.