<prompt> All are true about ramelteon except:Agonist at MT1 and MT2 receptorsIs a substrate of CYP1A2Has high addiction liabilityApproved for treatment of insomnia  <response>: Ref:katzung 11e p374 Ramelteon is non-addictive drug. Ramelteon, marketed as Rozerem among others, is a sleep agent that selectively binds to the MT1 and MT2 receptors in the suprachiasmatic nucleus SCN, instead of binding to GABAA receptors, such as with drugs like zolpidem. Ref: KD Tripathi 8th ed. 