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Amphetamines are a class of psychoactive drugs that are stimulants.Paradoxical drowsiness can sometimes occur in adults. [1] Research from the 1980s popularized the belief that ADHD stimulants such as amphetamine have a calming effect in individuals with ADHD, but opposite effects in the general population. [2]
Numerous observational studies and randomised trials (RCTs) have found that the impact on mortality of live and inactivated vaccines differ markedly. All live vaccines studied so far (BCG, measles vaccine, oral polio vaccine (OPV) and smallpox vaccine) have been shown to reduce mortality more than can be explained by prevention of the targeted infection(s).
In electrophilic aromatic substitution reactions, existing substituent groups on the aromatic ring influence the overall reaction rate or have a directing effect on positional isomer of the products that are formed.
The tendency to perceive meaningful connections between unrelated things. [17] The following are types of apophenia: Clustering illusion, the tendency to overestimate the importance of small runs, streaks, or clusters in large samples of random data (that is, seeing phantom patterns).
The original image of Barbra Streisand's cliff-top residence in Malibu, California, which she attempted to suppress in 2003. The Streisand effect is an unintended consequence of attempts to hide, remove, or censor information, where the effort instead increases public awareness of the information.
Sensenig & Brehm [7] applied Brehm's reactance theory [8] to explain the boomerang effect. They argued that when a person thinks that his freedom to support a position on attitude issue is eliminated, the psychological reactance will be aroused and then he consequently moves his attitudinal position in a way so as to restore the lost freedom.
Pharmacokinetics is the field of research studying the chemical and biochemical factors that directly affect dosage and the half-life of drugs in an organism, including absorption, transport, distribution, metabolism and excretion.
An example of a receptor site that possesses basal activity and for which inverse agonists have been identified is the GABA A receptors.Agonists for GABA A receptors (such as muscimol) create a relaxant effect, whereas inverse agonists have agitation effects (for example, Ro15-4513) or even convulsive and anxiogenic effects (certain beta-carbolines).