By Alan Poling
vii medicines and intercourse are issues approximately which most folks have robust critiques and vulnerable realizing. wisdom of every might be received in lots of methods, all with linked rewards and hazards. like any textbooks, this one used to be written within the trust that studying can foster studying. The publication is meant to introduce rules of behavioral pharmacology to readers with very little wisdom of the self-discipline yet with an curiosity in how medicines have an effect on human habit. Gleaning something of worth from the textual content calls for issues from the reader. the 1st is a willingness to simply accept an research of drug results that stocks little with folklore or logic no tions of drug motion. the second one is a willingness to just accept the truth that the behavioral results of gear are advanced and rely on a large variety of pharmacological and behavioral variables. except one knows those elements and the way they make sure a drug's activities, the behavioral results of gear should be neither pre dicted nor meaningfully defined. If it does not anything else, this quantity will make it seen that the behavioral results of gear are lawful and will be anticipated and understood at the foundation of well-established family members among empirical phenomena. De scribing those family and exploring how they permit behavioral ix x PREFACE pharmacologists to make feel of drug results which are differently incomprehensible was once an enormous target in getting ready the text.
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Extra info for A Primer of Human Behavioral Pharmacology
The presence of disease. and history with respect to the drug and other substances. In addition to these variables. genotype can influence the action of certain drugs. as can gender. Although the effects of drugs are lawful and can in principle be predicted accurately. drugs are not "magic bullets" which selectively and inevitably alter particular behaviors. All drugs are to some extent nonselective in their actions. and the actions of all drugs can be modulated by non pharmacological variables.
Relative safety increases with this ratio. but the therapeutic index is misleading unless the dose-response curves for lethality (or other undesired effects) and the desired effect fail to overlap across all or nearly all of their lengths. Time Course of Drug Action Although drug dosage is a strong determinant of observed effects. the actions of a given dose will obviously vary over time. Each substance has a characteristic time course of action. which CHAPTER 2 38 is determined by its physical properties.
1980. p. 29). Individual receptors show specificity in that only a limited number of drugs combine with them. Agonist drugs combine with receptors to produce a characteristic effect; such drugs have affinity (Le .. they combine with a receptor) and efficacy (Le .. they affect the function of that cell). Other drugs. termed antagonists. interact with the receptor or another cellular component to reduce the action of an agonist. If this action can be overcome by increasing the concentration of the agonist.