ChEBI

Any minor or unwanted substance introduced into the environment that can have undesired effects.

A narcotic or opioid substance, synthetic or semisynthetic agent producing profound analgesia, drowsiness, and changes in mood.

A compound that exhibits agonist activity at the mu-opioid receptor.

Any substance that inhibits the action of N-methyl-D-aspartate (NMDA) receptors. They tend to induce a state known as dissociative anesthesia, marked by catalepsy, amnesia, and analgesia, while side effects can include hallucinations, nightmares, and confusion. Due to their psychotomimetic effects, many NMDA receptor antagonists are used as recreational drugs.

A compound that specifically inhibits the reuptake of serotonin in the brain. This increases the serotonin concentration in the synaptic cleft which then activates serotonin receptors to a greater extent.

A xenobiotic (Greek, xenos "foreign"; bios "life") is a compound that is foreign to a living organism. Principal xenobiotics include: drugs, carcinogens and various compounds that have been introduced into the environment by artificial means.

A narcotic or opioid substance, synthetic or semisynthetic agent producing profound analgesia, drowsiness, and changes in mood.

A compound that exhibits agonist activity at the mu-opioid receptor.

A compound that specifically inhibits the reuptake of serotonin in the brain. This increases the serotonin concentration in the synaptic cleft which then activates serotonin receptors to a greater extent.