- Receiving concomitant therapy with: centrally-acting anorectic agents; monoamine-oxidase inhibitors; medications that act via serotonin including serotonin reuptake inhibitors; atomoxetine, or other centrally-acting noradrenergic agonist; cyproheptadine, and/or CYP 2D6/3A4/2B6 inhibitors/substrates.