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The elimination half-life is how long it takes for half of the drug to be eliminated by the body. "Time to peak" refers to when maximum levels of the drug in the blood occur after a given dose. "Time to peak" refers to when maximum levels of the drug in the blood occur after a given dose.
Diazepam is highly plasma protein-bound, with 96–99% of the absorbed drug being protein-bound. The distribution half-life of diazepam is two to 13 minutes. [20] Diazepam is highly lipid-soluble and is widely distributed throughout the body after administration.
Desmethyldiazepam has a half-life of 36–200 hours, and flurazepam, with the main active metabolite of desalkylflurazepam, with a half-life of 40–250 hours. These long-acting metabolites are partial agonists. [6] [145] Short-acting compounds have a median half-life of 1–12 hours.
This is the list of Schedule II controlled substances in the United States as defined by the Controlled Substances Act. [1] The following findings are required, by section 202 of that Act, for substances to be placed in this schedule: The drug or other substance has a high potential for abuse.
Pyrazolam (SH-I-04) [2] is a benzodiazepine derivative originally developed by a team led by Leo Sternbach at Hoffman-La Roche in the 1970s. [3] It has since been "rediscovered" and sold as a designer drug since 2012.
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 ...
The drug or other substance has a potential for abuse less than the drugs or other substances in schedules I and II. The drug or other substance has a currently [1] accepted medical use in treatment in the United States. Abuse of the drug or other substance may lead to moderate or low physical dependence or high psychological dependence.
In clinical practice, this means that it takes 4 to 5 times the half-life for a drug's serum concentration to reach steady state after regular dosing is started, stopped, or the dose changed. So, for example, digoxin has a half-life (or t 1 / 2 ) of 24–36 h; this means that a change in the dose will take the best part of a week to ...