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Narcolepsy01:07

Narcolepsy

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Narcolepsy is a chronic sleep disorder characterized by pervasive, uncontrolled sleepiness and other sleep disturbances. One of its hallmark symptoms is an abrupt transition to REM sleep upon falling asleep, which causes symptoms typically associated with this phase to occur unexpectedly during wakefulness. These include the following symptoms, which typically last from a minute or two to half an hour.
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Sedatives and hypnotics encompass a wide range of substances, each with its unique mechanism of action, uses, and potential adverse effects.
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...
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Management of Insomnia01:19

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The sleep cycle, an integral part of human health, consists of several stages with distinct characteristics and functions. It begins with a transition from wakefulness to sleep, known as the light sleep phase, followed by the restorative deep sleep phase, essential for physical recovery and growth. The cycle concludes with the Rapid Eye Movement (REM) phase, characterized by high brain activity and vivid dreaming. Insomnia, a prevalent sleep disorder, involves difficulty falling asleep, staying...
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Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and  rapid eye movement (REM).
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Neurodegenerative disorders, such as Parkinson's Disease (PD), involve the gradual and irreversible destruction of neurons in particular brain areas. These disorders exhibit standard features like proteinopathies, selective vulnerability of some neurons, and an interaction of intrinsic properties, genetics, and environmental influences in neural injury.
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Sedatives and Hypnotics Drugs: Benzodiazepines

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Benzodiazepines have both sedative and hypnotic properties. They include compounds such as diazepam (Valium) and alprazolam (Xanax). Structurally, their cores are similar, consisting of the fusion of a benzene ring and a diazepine ring, but they share a common mechanism of action in the central nervous system (CNS).
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Pitolisant for treating patients with narcolepsy.

Shuang Li1, Junyi Yang1

  • 1Department of Pharmaceutical, Central Hospital of Linyi City, Yishui, Shandong, China.

Expert Review of Clinical Pharmacology
|January 16, 2020
PubMed
Summary
This summary is machine-generated.

Pitolisant, a novel histamine 3 receptor drug, effectively treats narcolepsy by reducing excessive daytime sleepiness and cataplexy. This review covers its properties, efficacy, and safety, offering a new therapeutic option.

Keywords:
Cataplexyexcessive daytime sleepinesshistamine 3 receptorinverse agonistnarcolepsypitolisant

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Area of Science:

  • Pharmacology
  • Neurology
  • Sleep Medicine

Background:

  • Narcolepsy is a chronic neurological disorder impacting sleep-wake cycles.
  • Key symptoms include excessive daytime sleepiness and cataplexy.
  • Current treatments aim to manage these debilitating symptoms.

Purpose of the Study:

  • To provide a comprehensive review of pitolisant.
  • To detail its chemical properties, mechanism of action, pharmacokinetics, clinical efficacy, and safety.
  • To briefly outline the evolution of narcolepsy treatments.

Main Methods:

  • Systematic literature review using PubMed.
  • Keywords: 'pitolisant', 'narcolepsy', 'cataplexy', 'excessive daytime sleepiness', 'histamine 3 receptor'.
  • Analysis of chemical properties, pharmacology, and clinical trial data.

Main Results:

  • Pitolisant acts as a histamine 3 receptor antagonist/inverse agonist, enhancing wakefulness.
  • Clinical studies demonstrate significant reduction in excessive daytime sleepiness and cataplexy compared to placebo.
  • Pitolisant exhibits a favorable safety profile, with common side effects including headache, insomnia, nausea, and anxiety.

Conclusions:

  • Pitolisant is a promising first-in-class treatment for narcolepsy.
  • Its unique mechanism offers a novel approach to managing narcolepsy symptoms.
  • Further research may explore its long-term efficacy and broader applications.