Xanax (alprazolam) is sometimes prescribed by veterinarians to help dogs manage anxiety, stress, and panic-related behaviors, such as noise phobia, separation anxiety, or travel stress. As a fast-acting benzodiazepine, it works by calming the nervous system, but it must be used cautiously under veterinary supervision due to potential side effects like drowsiness, disorientation, or dependency. Dosage varies by dog size and condition, and it’s not suitable for all pets.