(Pfizer Animal Health) Clavamox Tablets for Dogs and Cats is a broad spectrum antibiotic for use in dogs and cats. Clavamox Tablets (amoxicillin trihydrate/clavulanate potassium) contain amoxicillin and clavulanic acid as potassium salt. Clavamox Tablets are used in dogs and cats for skin and soft tissue infections such as wounds, abscesses and cellulitis. Clavamox has been shown to be clinically effective for treating cases of canine periodontal disease. Clavamox may be used in cats for urinary tract infections (cystitis) due to susceptible strains of E. coli.