* Desipramine (CYP2D6 substrate) levels increase 8-fold with co-administration * Paroxetine (CYP2D6 inhibitor and substrate) * Memantine
Dextromethorphan/quinidine
Fentanyl/fluanisone
Bupivacaine/meloxicam
Oxycodone/naloxone
Desloratadine/pseudoephedrine
Pseudoephedrine/loratadine
Phenylephrine/ketorolac
Buprenorphine/naloxone