Functional selectivity[edit]
A new strategy of drug development takes receptor signal transduction into consideration. The strategy strives to increase activation of desirable, and to reduce impact on undesirable, signalling pathways. This differential strategy has been given several names, including functional selectivity and biased agonism. The first opioid that was intentionally designed as a biased agonist and placed into clinical evaluation is a chemical compound with the code number TRV130. It displays analgesic activity and reduced adverse effects.