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Simply switching the patient from 40 mg of morphine to 10 mg of levorphanol would be dangerous due to dose accumulation, and hence frequency of administration should also be taken into account. There are other concerns about equianalgesic charts. Many charts derive their data from studies conducted on opioid-naive patients.
The weakest compounds such as benzylfentanyl are around the same potency as codeine (i.e. approximately 1/10th the potency of morphine), while the strongest compounds such as carfentanil and ohmefentanil can be over 10,000x more potent than morphine, meaning there is a 100,000-fold variation in potency between the strongest and weakest fentanyl ...
Because of fentanyl's high lipid solubility, its effects are more localized than morphine, and some clinicians prefer to use morphine to get a wider spread of analgesia. [37] It is widely used in obstetrical anesthesia because of its short time to action peak (about 5 minutes), the rapid termination of its effect after a single dose, and the ...
N-Phenethylnormorphine is an opioid analgesic drug derived from morphine by replacing the N-methyl group with β-phenethyl. [1] It is around eight to fourteen times more potent than morphine as a result of this modification, [2] in contrast to most other N-substituted derivatives of morphine, which are substantially less active, or act as antagonists. [3]
Morphine [2] 9668 opiate Noroxymorphone [5] 9610 opiate Opium extracts [2] 9620 opiate Opium fluid [2] 9330 opiate Oripavine [6] 9143 opiate Oxycodone [2] 9652 opiate Oxymorphone [2] 9639 opiate Powdered opium [2] 9600 opiate Raw opium [2] 9333 opiate Thebaine [2] 9630 opiate Tincture of opium [2] opiate Opium poppy and poppy straw [7] [note 1 ...
The latter is listed as being up to 30,000 times more potent than morphine. [10] Side effects of fentanyl analogues are similar to those of fentanyl itself, which include itching, nausea and potentially serious respiratory depression, which can be life-threatening.
Thiafentanil (A-3080, Thianil) is a highly potent opioid analgesic that is an analog of fentanyl, and was invented in 1986. [1] Its analgesic potency is slightly less than that of carfentanil (itself approximately 10,000 times the potency of morphine, or 4,000 times that of heroin), [2] though with a faster onset of effects, shorter duration of action and a slightly lesser tendency to produce ...
There are no clinical guidelines outlining the use and implementation of opioid rotation. However, this strategy is commonly used for these various situations: pain not controlled by current opioid, pain controlled but in the presence of intolerable adverse events, pain not controlled despite rapid increase in opioid dose, switching to utilize different alternative routes of administration, or ...