The first category\is the anxiolytic benzodiazepines, which mainly act on the reticular formation of the brainstem and the limbic system of the brain, especially the amygdala and Valium, clonazepam, alprazolam, eszopiclam, lorazepam, etc. The second category\is the antidepressants, which mainly act on the mesencephalon (especially the hypothalamus).
The second category\is antidepressants, which act mainly on the mesencephalon (especially the hypothalamus), followed by the limbic system, like this fluoxetine, fluvoxamine, paroxetine, doxepin, amitriptyline and so on.
The third category, is the antihistamine drugs, like Antares.
The fourth category is barbiturates or non-barbiturates, like barbiturates or luminal.
The fifth category is antipsychotics and other sedative drugs, such as chlorpromazine, clozapine, Tilden and so on, which are antipsychotics that mainly act on the brainstem, pontine, limbic system or mesencephalon. The sleeping effect of benzodiazepines in sleeping drugs is very significant, and safe, cheap, side effects are small, easy to use, is currently the most widely used drugs to improve sleep.