Fluoxetine Compounded Oral Liquid for Dogs and CatsDescription Description Fluoxetine is an FDA approved medication used to treat a variety of behavior disorders such as separation anxiety and aggression in dogs and cats. It belongs to a group of drugs known as selective serotonin reuptake inhibitors (SSRIs). When used for anxiety, fluoxetine works by increasing serotonin levels in the central nervous system. This allows the serotonin to accumulate and affect the part of the brain that is responsible