| Autor: |
Z. S. El-Wardany, J. R. Bianchine, C. P. Brown, D. R. Britton |
| Rok vydání: |
1978 |
| Předmět: |
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| Zdroj: |
Handbook of Psychopharmacology ISBN: 9781468431919 |
| DOI: |
10.1007/978-1-4684-3189-6_5 |
| Popis: |
The study of pharmacokinetics is intended to provide information about the dynamics of the various factors which determine the proportion of a given dose of a drug which will become available at specific receptor sites to produce a therapeutic or a toxic effect. In a generalized overview of the subject, Levine (1973) notes that these factors include (1) the rate and extent of absorption from the site of application; (2) the rate and extent of distribution to various tissues and fluids; (3) the rate of biotransformation to active or inactive metabolites; and (4) the rate of excretion from the body. These processes are a function of the physiochemical properties of the drug (e.g., lipid solubility and molecular weight) and of the physiologic status of the patient. As will be seen, this latter aspect is determined not only by intervening pathologic processes, but also to a great extent by normal interindividual variability in parameters such as the proportion of drug bound to plasma proteins, the rate of hepatic blood flow, and the activity of enzymatic processes responsible for biotransformation. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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