<prompt> All of the following are true about sedatives hypnotics exceptRamelton is a melatonin antagonist used to treat jet lagThiopentone is contraindicated in porphyriasMidazolam is the shortest acting BenzodiazepineSuvorexant is Orexin receptor antagonist used in insomnia  <response>: Melatonin is secreted by pineal gland in darkness, which acts on Melatonin 1 Melatonin 2 receptors to induce sleep.Ramelton is a Melatonin receptor agonist used for sleep induction in Jet lag. 