ITI-333 is a drug which has a mixed mechanism of action, acting as an
antagonist
An antagonist is a character in a story who is presented as the main enemy or rival of the protagonist and is often depicted as a villain.5-HT2A, D1 and α1A
receptors
Receptor may refer to:
*Sensory receptor, in physiology, any neurite structure that, on receiving environmental stimuli, produces an informative nerve impulse
*Receptor (biochemistry), in biochemistry, a protein molecule that receives and responds ...
, and also as a
partial agonist
In pharmacology, partial agonists are drugs that bind to and activate a given Receptor (biochemistry), receptor, but have only partial Intrinsic activity, efficacy at the receptor relative to a full agonist. They may also be considered Ligand (bio ...
at the
μ-opioid receptor
The μ-opioid receptors (MOR) are a class of opioid receptors with a high affinity for enkephalins and beta-endorphin, but a low affinity for dynorphins. They are also referred to as μ(''mu'')-opioid peptide (MOP) receptors. The prototypical ...
. In animal studies it blocked the
head-twitch response
The head-twitch response (HTR), also sometimes known as wet dog shakes (WDS) in rats, is a rapid side-to-side head movement that occurs in mice and rats in association with serotonin 5-HT2A receptor activation. Serotonergic psychedelics like lys ...
morphine
Morphine, formerly also called morphia, is an opiate that is found naturally in opium, a dark brown resin produced by drying the latex of opium poppies (''Papaver somniferum''). It is mainly used as an analgesic (pain medication). There are ...
, while also reducing the symptoms produced by
naloxone
Naloxone, sold under the brand name Narcan among others, is an opioid antagonist, a medication used to reverse or reduce the effects of opioids. For example, it is used to restore breathing after an opioid overdose. Effects begin within two ...
-precipitated withdrawal in opioid habituated mice. It has been developed for potential uses in treatment of
opioid withdrawal
Opioid withdrawal is a set of symptoms arising from the sudden cessation or reduction of opioids where previous usage has been heavy and prolonged. Signs and symptoms of withdrawal can include drug craving, anxiety, restless legs syndrome, naus ...
and
opioid use disorder
Opioid use disorder (OUD) is a substance use disorder characterized by cravings for opioids, continued use despite physical and/or psychological deterioration, increased tolerance with use, and withdrawal symptoms after discontinuing opioids. ...
.
See also
*
IHCH-7086
IHCH-7086 is a drug which acts as an agonist at the 5-HT2A serotonin receptor. It was derived by structural simplification of the 5-HT2A antagonist atypical antipsychotic drug lumateperone along with several related compounds such as IHCH-7079 ...
*
IHCH-7079
IHCH-7079 is a drug which acts as an agonist at the 5-HT2A serotonin receptor. It was derived by structural simplification of the 5-HT2A antagonist atypical antipsychotic drug lumateperone along with several related compounds such as IHCH-7086, ...
*
IHCH-7113
IHCH-7113 is a putative psychedelic drug which acts as an agonist at the 5-HT2A serotonin receptor. It was derived by structural simplification of the 5-HT2A receptor antagonist atypical antipsychotic drug lumateperone along with several relate ...