Perlapine
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Perlapine, sold under the brand names Hypnodine and Pipnodine, is a
hypnotic Hypnotic (from Greek ''Hypnos'', sleep), or soporific drugs, commonly known as sleeping pills, are a class of (and umbrella term for) psychoactive drugs whose primary function is to induce sleep (or surgical anesthesiaWhen used in anesthesia ...
and
sedative A sedative or tranquilliser is a substance that induces sedation by reducing irritability or excitement. They are CNS depressants and interact with brain activity causing its deceleration. Various kinds of sedatives can be distinguished, but t ...
of the
tricyclic Tricyclics are chemical compounds that contain three interconnected rings of atoms. Many compounds have a tricyclic structure, but in pharmacology, the term has traditionally been reserved to describe heterocyclic drugs. Among these are antid ...
group which is marketed in
Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...
. It acts primarily as a potent
antihistamine Antihistamines are drugs which treat allergic rhinitis, common cold, influenza, and other allergies. Typically, people take antihistamines as an inexpensive, generic (not patented) drug that can be bought without a prescription and provides re ...
, and also has
anticholinergic Anticholinergics (anticholinergic agents) are substances that block the action of the neurotransmitter called acetylcholine (ACh) at synapses in the central and peripheral nervous system. These agents inhibit the parasympathetic nervous system ...
, antiserotonergic,
antiadrenergic An adrenergic antagonist is a drug that inhibits the function of adrenergic receptors. There are five adrenergic receptors, which are divided into two groups. The first group of receptors are the beta (β) adrenergic receptors. There are β1, Π...
, and some
antidopaminergic A dopamine antagonist, also known as an anti-dopaminergic and a dopamine receptor antagonist (DRA), is a type of drug which blocks dopamine receptors by receptor antagonism. Most antipsychotics are dopamine antagonists, and as such they have ...
activity. The drug has relatively weak
affinity Affinity may refer to: Commerce, finance and law * Affinity (law), kinship by marriage * Affinity analysis, a market research and business management technique * Affinity Credit Union, a Saskatchewan-based credit union * Affinity Equity Par ...
for the
dopamine Dopamine (DA, a contraction of 3,4-dihydroxyphenethylamine) is a neuromodulatory molecule that plays several important roles in cells. It is an organic compound, organic chemical of the catecholamine and phenethylamine families. Dopamine const ...
D2 receptor ( = 1,803 nM) and, in accordance, is said to be ineffective as an
antipsychotic Antipsychotics, also known as neuroleptics, are a class of Psychiatric medication, psychotropic medication primarily used to manage psychosis (including delusions, hallucinations, paranoia or disordered thought), principally in schizophrenia but ...
. However, it retains higher affinity for the dopamine D1 receptor ( = 198 nM). Its values are 19 nM for the α1-adrenergic receptor, 4,945 nM for the α2-adrenergic receptor, and 70 nM for the
serotonin Serotonin () or 5-hydroxytryptamine (5-HT) is a monoamine neurotransmitter. Its biological function is complex and multifaceted, modulating mood, cognition, reward, learning, memory, and numerous physiological processes such as vomiting and vas ...
5-HT2A receptor. Perlapine is closely related to clotiapine,
clozapine Clozapine is a psychiatric medication and is the first atypical antipsychotic (also called second-generation antipsychotic). It is primarily used to treat people with schizophrenia and schizoaffective disorders who have had an inadequate respo ...
,
fluperlapine Fluperlapine (NB 106-689), also known as fluoroperlapine, is a morphanthridine (11''H''-dibenzo ,ezepine) atypical antipsychotic with additional antidepressant and sedative effects. It was first synthesized in 1979, and then subsequently studie ...
,
loxapine Loxapine, sold under the brand names Loxitane and Adasuve (''inhalation'' only) among others, is an antipsychotic medication used primarily in the treatment of schizophrenia. The medicine is a member of the dibenzoxazepine class and structural ...
, and tilozepine. Perlapine has been suggested as a potential ligand for certain DREADDs.


References

5-HT2A antagonists Alpha-1 blockers Dibenzodiazepines Dopamine antagonists H1 receptor antagonists Muscarinic antagonists Piperazines Serotonin receptor antagonists {{sedative-stub