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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.
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.
The model outputs for a drug can be used in industry (for example, in calculating bioequivalence when designing generic drugs) or in the clinical application of pharmacokinetic concepts. Clinical pharmacokinetics provides many performance guidelines for effective and efficient use of drugs for human-health professionals and in veterinary medicine .
It has a relatively short elimination half-life, with the reported average value of 5 to 7 hours. [93] Because of its short elimination half-life, gabapentin must be administered 3 to 4 times per day to maintain therapeutic levels. [99] Gabapentin XR (brand name Gralise) is taken once a day. [100]
While flutazolam has a very short half-life of only 3.5 hours, n-desalkylflurazepam has a long half-life of between 47–100 hours. [4] Flutazolam is closely related in structure to another benzodiazepine, haloxazolam. [5] [6]
Well, when we published the price list of what started as 100-plus drugs and now is 2,500 medications, all of a sudden there was a benchmark that everybody could compare.
The unchanged drug was 96% bound to plasma proteins. The blood-level decline of the parent drug was biphasic, with the short half-life ranging from 0.4 to 0.6 hours and the terminal half-life from 3.5 to 18.4 hours (mean 8.8 hours), depending on the study population and method of determination. [62]
Triazolam is usually used for short-term treatment of acute insomnia and circadian rhythm sleep disorders, including jet lag. It is an ideal benzodiazepine for this use because of its fast onset of action and short half-life. It puts a person to sleep for about 1.5 hours, allowing its user to avoid morning drowsiness.