Trevena initiates TRV734 clinical development Trevena announced the initiation of its first Phase 1 trial for TRV734. TRV734 is being developed to optimize analgesia while minimizing on-target gastrointestinal and respiratory effects through its novel biased ligand mechanism at the mu-opioid receptor. TRV734 takes advantage of the same receptor specificity mechanism as does Trevena’s Phase 2 clinical candidate, TRV130. The main objective of this first-in-human trial is to evaluate the safety, tolerability, pharmacokinetics and pharmacodynamics of single ascending doses of TRV734 in healthy subjects. The potentially efficacious dose range of TRV734 will also be evaluated using pupilometry, a validated biomarker for mu-opioid receptor engagement.