Deudextromethorphan is under investigation in clinical trial NCT02153502 (Efficacy, Safety, and Tolerability Study of AVP-786 as an Adjunctive Therapy in Patients With Major Depressive Disorder With an Inadequate Response to Antidepressant Treatment).

Dextromethorphan is a levorphanol derivative and codeine analog commonly used as a cough suppressant and also a drug of abuse.[A215412] Although similar in structure to other opioids, it has minimal interaction with opioid receptors.[A215412] Dextromethorp…

It has been estimated that 5-10% of adults globally suffer from chronic cough, which is defined as a cough lasting longer than eight weeks.[L48601] A subset of these patients remain symptomatic despite thorough investigation and treatment, termed refractory c…

Hydrocodone is a synthetic opioid derivative of codeine.[T116] It is commonly used in combination with [acetaminophen] to control moderate to severe pain. Historically, hydrocodone has been used as a cough suppressant although this has largely been replaced b…