Pharmacology Central Nervous system 10721c0b Which of the following is not an opioid peptide? A Beta Endorphin B Epinephrine C Leu5-encephalin D Met5-encephalin High-Yield Explanation Beta endorphin, leu-5 encephalin, met-5encephalin are all opiod peptides. Ref KD Tripathi 8th ed.