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An equianalgesic chart can be a useful tool, but the user must take care to correct for all relevant variables such as route of administration, cross tolerance, half-life and the bioavailability of a drug. [5] For example, the narcotic levorphanol is 4–8 times stronger than morphine, but also has a much longer half-life. Simply switching the ...
Hydromorphone is believed to work by activating opioid receptors, mainly in the brain and spinal cord. [7] Hydromorphone 2 mg IV is equivalent to approximately 10 mg morphine IV. [9] Hydromorphone was patented in 1923. [12] Hydromorphone is made from morphine. [13] It is on the World Health Organization's List of Essential Medicines. [14]
Radioactive isotope table "lists ALL radioactive nuclei with a half-life greater than 1000 years", incorporated in the list above. The NUBASE2020 evaluation of nuclear physics properties F.G. Kondev et al. 2021 Chinese Phys. C 45 030001. The PDF of this article lists the half-lives of all known radioactives nuclides.
Morphinone itself is an active opioid, though its potency is closer to codeine than morphine. [citation needed] It is, however, an important precursor and would fall under the purview of the Controlled Substances Act within the United States.
Caesium in the body has a biological half-life of about one to four months. Mercury (as methylmercury) in the body has a half-life of about 65 days. Lead in the blood has a half life of 28–36 days. [29] [30] Lead in bone has a biological half-life of about ten years. Cadmium in bone has a biological half-life of about 30 years.
Chemical Agents Warning Properties Latency Period Initial Symptoms Blister Agents Lewisite Gas: colorless Odor: geraniums Seconds to minutes
For constant pain, the relieving effect of extended-release morphine given once (for Kadian [9]) or twice (for MS Contin [9]) every 24 hours is roughly the same as multiple administrations of immediate release (or "regular") morphine. [10]
Context-sensitive half-life or context sensitive half-time is defined as the time taken for blood plasma concentration of a drug to decline by one half after an infusion designed to maintain a steady state (i.e. a constant plasma concentration) has been stopped. The "context" is the duration of infusion.