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Opiate overdose symptoms and signs can be referred to as the "opioid toxidrome triad": decreased level of consciousness, pinpoint pupils and respiratory depression. Other symptoms include seizures and muscle spasms. Sometimes an opiate overdose can lead to such a decreased level of consciousness such that the person will not wake up.
The terms 'opioid' and 'opiate' are sometimes used interchangeably, but the term 'opioid' is used to designate all substances, both natural and synthetic, that bind to opioid receptors in the brain. [4] Opiates are alkaloid compounds naturally found in the opium poppy plant Papaver somniferum. [5] [6]
[57] [79] As a result of downregulated signaling through these proteins, opiates cause VTA neuronal hyperexcitability and shrinkage (specifically, the size of the neuronal soma is reduced). [57] It has been shown that when an opiate-naive person begins using opiates in concentrations that induce euphoria, BDNF signaling increases in the VTA. [80]
This receptor is known as the nociceptin receptor or ORL1 (opiate receptor-like 1). The opioid receptor types are nearly 70% identical, with the differences located at the N and C termini. The μ receptor is perhaps the most important. It is thought that the G protein binds to the third intracellular loop of all opioid receptors.
An opiate is an alkaloid substance derived from opium (or poppy straw). [1]
A chart outlining the structural features that define opiates and opioids, including distinctions between semi-synthetic and fully synthetic opiate structures Fentanyl. 2 mg (white powder to the right) is a lethal dose in most people. [1] US penny is 19 mm (0.75 in) wide.
Structural correlation between met-enkephalin, an opioid peptide (left), and morphine, an opiate drug (right) Opioid peptides or opiate peptides are peptides that bind to opioid receptors in the brain; opiates and opioids mimic the effect of these peptides. Such peptides may be produced by the body itself, for example endorphins. The effects of ...
Opiates v opioids illustrated with diagrams and sub-classifications Three countries in Europe have active HAT programs , namely England , the Netherlands and Switzerland . Despite critical voices by conservative think-tanks with regard to these harm-reduction strategies, significant progress in the reduction of drug-related deaths has been ...