red22
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The use of the terms "opiate" and "opioid" requires clarification. Until the 1980s, the term "opiate" was used extensively to describe any natural or synthetic agent that was derived from morphine. One could say an opiate was any compound that was structurally related to morphine. In the mid-1970s, the discovery of peptides in the brain with pharmacologic actions similar to morphine prompted a change in nomenclature. These peptides were not easily related to morphine structurally, yet their actions were like those produced by morphine. At this time, the term "opioid," meaning opium- or morphine-like in terms of pharmacologic action, was introduced. The broad group of opium alkaloids, synthetic derivatives related to the opium alkaloids, and the many naturally occurring and synthetic peptides with morphine-like pharmacologic effects are called opioids. In addition to having pharmacologic effects similar to morphine, a compound must be antagonized by an opioid antagonist, such as naloxone, to be classed as an opioid. The neuronal-located proteins to which opioid agents bind and initiate biologic responses are called opioid receptors.
Foye's Principles of Medicinal Chemistry. Foye WO, Williams DA, Lemke TL. 2013 20. Central Analgesics / OPIATE/OPIOID, p. 663
The term "opiates" takes on a number of different meanings depending on the context in which it is used. In the strictest sense, it refers to those materials isolated from the opium poppy Papaver somniferum. The total extract is known as opium, which can be used as such, as the dry mixture of the salts (Pantopon), or as a tincture (Laudanum). The principal medically recognized component materials are morphine and its methyl ether, codeine. A number of additional alkaloids are present, probably the most valuable of which is thebaine, a chemical precursor of other active drugs. In a somewhat looser chemical sense, the term "opiates" has come to refer to those drugs derived from chemicals originating within the opium poppy. The best examples are heroin, which is a diacetyl derivative of morphine, the numerous clinically recognized members of the morphinone and codeinone group, and the less well-studied but exceptionally potent adducts of thebaine.
In the popular pharmacologic sense, the term "opiates" must be extended to embrace any drug, regardless of chemical origins, that can be substituted for morphine or heroin in abuse potential. Thus, the family is extended to embrace a host of drugs patterned after some part of the paradigm molecule, morphine, but which are totally independent of any botanical origins.
Drugs of abuse in the future. Shulgin, A. T. 1976. Clinical Toxicology, 8(4), 405–456. DOI: 10.3109/15563657508990076 OPIATES, pg. 407
Foye's Principles of Medicinal Chemistry. Foye WO, Williams DA, Lemke TL. 2013 20. Central Analgesics / OPIATE/OPIOID, p. 663
The term "opiates" takes on a number of different meanings depending on the context in which it is used. In the strictest sense, it refers to those materials isolated from the opium poppy Papaver somniferum. The total extract is known as opium, which can be used as such, as the dry mixture of the salts (Pantopon), or as a tincture (Laudanum). The principal medically recognized component materials are morphine and its methyl ether, codeine. A number of additional alkaloids are present, probably the most valuable of which is thebaine, a chemical precursor of other active drugs. In a somewhat looser chemical sense, the term "opiates" has come to refer to those drugs derived from chemicals originating within the opium poppy. The best examples are heroin, which is a diacetyl derivative of morphine, the numerous clinically recognized members of the morphinone and codeinone group, and the less well-studied but exceptionally potent adducts of thebaine.
In the popular pharmacologic sense, the term "opiates" must be extended to embrace any drug, regardless of chemical origins, that can be substituted for morphine or heroin in abuse potential. Thus, the family is extended to embrace a host of drugs patterned after some part of the paradigm molecule, morphine, but which are totally independent of any botanical origins.
Drugs of abuse in the future. Shulgin, A. T. 1976. Clinical Toxicology, 8(4), 405–456. DOI: 10.3109/15563657508990076 OPIATES, pg. 407
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