| Enkephalin |
Either of two pentapeptides that bind to morphine receptors
in the central nervous system and have opioid properties of relatively short
duration; one pentapeptide (Met enkephalin) has the amino acid sequence
Tyr-Gly-Gly-Phe-Met and the other (Leu enkephalin) has the sequence Tyr-Gly-Gly-Phe-Leu. |
| Half-life |
The length of time it takes for half of the total amount of drug in the
body to be eliminated. |
| Hypoxia |
Deficiency in the amount of oxygen reaching body tissues. |
| Insufflate |
To treat medically by blowing a powder, gas, or vapor into a bodily cavity
(also referred to as "snorting"). |
| Intraduodenal |
An injection into the first portion of the small intestine, from the stomach
to the jejunum. |
| Opiate |
Naturally occurring substances from the poppy plant as opiates with effects
akin to morphine. |
| Opioid |
A semi-synthetic or synthetic substance derived from or resembling the
substances in the poppy plant or endogenous opioids. |
| Partial
opioid agonist |
An opioid with a lower maximal efficacy which makes it unable to produce
as large an effect as a full opioid agonist even if the dose is increased.
|
| Psychotomimetic |
Tending to induce hallucinations, delusions, or other symptoms of a psychosis.
Used of a drug. |
| Volume
of distribution |
Relates amount of drug in the body to the concentration in the plasma.
|
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