Avoid usage of the medicine in animals allergic to cephalosporin or penicillin. The medication should be used with extreme caution in pregnant and nursing animals, and while administered with probenecid or aminoglycosides like neomycin and gentamicin. It is advised to inform the veterinarian or pharmacist about the medicines the pet is taking. Also, make sure that the treatment is continued, even if the pet is fully recovered from the infections. Great care should be given on the dosage. Over-dosage could lead to adverse side effects. Cephalosporin is not effective to fight infections triggered by mites, parasites, viruses or fungi. Also, the medication should not be given more often than directed.