My pet has the same thing wrong that he/she was just treated for. Can the veterinarian just prescribe the same medication that he/she did the last time?

Even though your pet may be showing the same symptoms as he or she did the last time, the problem may be different or the existing condition may have evolved or progressed. Many diseases have similar symptoms, and your veterinarian needs to examine your pet to ensure that he or she correctly diagnoses the cause.