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Drug tolerance is indicative of drug use but is not necessarily associated with drug dependence or addiction. [4] The process of tolerance development is reversible (e.g., through a drug holiday [5]) and can involve both physiological factors and psychological factors. [6] One may also develop drug tolerance to side effects, [7] in which case ...
For example, a patient could possess a genetic defect in a drug metabolizing enzyme in the cytochrome P450 superfamily. While most individuals will possess the effective metabolizing machinery, a person with a defect will have a difficult time trying to clear the drug from their system. Thus, the drug will accumulate within the blood to higher ...
Tolerability refers to the degree to which overt adverse effects of a drug can be tolerated by a patient. [1] Tolerability of a particular drug can be discussed in a general sense, or it can be a quantifiable measurement as part of a clinical study.
Tachyphylaxis (Greek ταχύς, tachys, "rapid", and φύλαξις, phylaxis, "protection") is a medical term describing an acute, sudden decrease in response to a drug after its administration (i.e., a rapid and short-term onset of drug tolerance). [1] It can occur after an initial dose or after a series of small doses.
TDM interpretation: an anticancer drug is given to a patient at a dosage of 400 mg every day at 8:00 am. A TDM sample is obtained at 6:00 am, showing a drug concentration of 0.46 mg/L. 1) Regarding “normality”, the result is around the 25th percentile, suggesting a rather high drug clearance in this patient.
As shown in table 1 below these are the examinable topics which are generally rated a number between 0 to 4 depending on the patient's current condition. In some COWS, a rating of 5 can also be given (shown in the table 1 below). The annotated table lists the signs and symptoms that are being monitored at score 0 and 4.
The progression of tolerance at intervals shorter than 24 hours remains largely unknown. [74] Tolerance typically resets to baseline after 3–4 days of abstinence. [75] [76] Significant cross-tolerance occurs between LSD, mescaline and psilocybin. [77] [78] A slight cross-tolerance to DMT is observed in humans highly tolerant to LSD. [79]
For a response of 0.25a.u., Drug B is more potent, as it generates this response at a lower concentration. For a response of 0.75a.u., Drug A is more potent. a.u. refers to "arbitrary units". In pharmacology , potency or biological potency [ 1 ] is a measure of a drug's biological activity expressed in terms of the dose required to produce a ...