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Acute use (1–3 days) yields a potency about 1.5× stronger than that of morphine and chronic use (7 days+) yields a potency about 2.5 to 5× that of morphine. Similarly, the effect of tramadol increases after consecutive dosing due to the accumulation of its active metabolite and an increase of the oral bioavailability in chronic use.
Approved indication for dihydrocodeine is the management of moderate to moderately severe pain as well as coughing and shortness of breath. As is the case with other drugs in this group, the antitussive dose tends to be less than the analgesic dose, and dihydrocodeine is a powerful cough suppressant like all other members of the immediate codeine family (see below) and their cousins ...
After a dose of conventional (immediate-release) oral oxycodone, the onset of action is 10 to 30 minutes, [11] [9] and peak plasma levels of the drug are attained within roughly 30 to 60 minutes; [11] [9] [74] in contrast, after a dose of OxyContin (an oral controlled-release formulation), peak plasma levels of oxycodone occur in about three ...
Some references state that the analgesic action of hydrocodone begins in 20–30 minutes and lasts about 4–8 hours. [28] The manufacturer's information says onset of action is about 10–30 minutes and duration is about 4–6 hours. [29] Recommended dosing interval is 4–6 hours. Hydrocodone reaches peak serum levels after 1.3 hours. [30]
14-Hydroxydihydrocodeine (RAM-318) is an opiate analgesic drug, which is also an active metabolite of oxycodone and hydromorphinol. [ 1 ] [ 2 ] 14-Hydroxydihydrocodeine is not currently marketed in any developed country, but has been of interest to pharmaceutical companies looking for new analgesics and antitussives .
Oxymorphone (sold under the brand names Numorphan and Opana among others) is a highly potent opioid analgesic indicated for treatment of severe pain. Pain relief after injection begins after about 5–10 minutes, after oral administration it begins after about 30 minutes, and lasts about 3–4 hours for immediate-release tablets and 12 hours for extended-release tablets. [6]
Carbonate derivatives of 14β-hydroxycodeine "viz., 14β-hydroxy-6-O-(methoxycarbonyl)codeine, 6-O-methoxycarbonyl-14β-(methoxycarbonyloxy)codeine, and 14β-acetoxy-6-O-methoxy-carbonylcodeine, potential substrates for ring C modification in morphinane (sic) alkaloids, were synthesized for the first time."
Dihydroisocodeine is an opioid. [1] The National Research Council of the United States reported in 1941 that isocodeine is one of four isomers of codeine known at the time (heterocodeine can be considered a fifth) and DHIC, then in use in Europe as a pharmaceutical, was four times stronger than dihydrocodeine as isocodeine is four times stronger than codeine.