Related Experiment Video
Updated: Aug 17, 2026

Disrupting Reconsolidation of Fear Memory in Humans by a Noradrenergic β-Blocker
Published on: December 18, 2014
Naloxone reverses the serotonin dependent hypotensive action of CGP 6085 A
Abstract:
CGP 6085 A, a specific 5-hydroxytryptamine (5-HT), serotonin uptake inhibitor, is also a potent hypotensive agent. Its depressor effect in the spontaneously hypertensive (SH) rats correlates well with its ability to inhibit serotonin uptake. Here we report that the effects of CGP 6085 A on arterial blood pressure were greatly reduced in rats pretreated with p-chlorophenylalanine (pCl-Phe), a specific depletor of serotonin. Moreover, in rats pretreated with the serotonin antagonist, methysergide, CGP 6085 A did not produce significant hypotension. We also found that centrally administered naloxone reverses the hypotensive effect of CGP 6085 A. These results provide further evidence for the existence of an important serotonin-opioid interaction in the mechanisms of arterial blood regulation in the rat.
Related Concept Videos
Drugs Affecting Neurotransmitter Release or Uptake
Drugs Affecting Neurotransmitter Synthesis
Opioid Analgesics: Synthetic and Semisynthetic Opioids
Antidepressant Drugs: MAOIs and Other Agents
Sedatives and Hypnotics Drugs: Miscellaneous Agents
Melatonin congeners like ramelteon (Rozerem) and tasimelteon (Hetlioz) selectively bind to melatonin receptors (MT1 and MT2) and thus mimic the actions of melatonin, a hormone that regulates sleep-wake cycles. Tasimelteon is primarily used for non-24-hour sleep-wake disorder, common in blind patients. They are also used to treat conditions like insomnia...
Pharmaceutical Poisoning: Treatment Strategies

