Provided herein are treatments for reducing pain in dogs. The treatments generally comprise a combination of an opioid compound, such as methadone, and an azole compound, such as fluconazole. The treatments may further comprise an opioid abuse deterrent that advantageously inhibits opioid effects in humans while maintaining desirable analgesic effects in dogs. Additionally, the treatments provided herein avoid the undesirable side effects of prior art opioid treatments for dogs. The treatments may be administered as separate doses or in a single formulation product for improved compliance. The treatments have wide use potential in dogs from perioperative patients to inpatients and outpatients and may be used, for example, for sedation in minor procedures, analgesia, and decreasing temperature in canine patients.