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Topic: Physiological tolerance


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In the News (Mon 23 Nov 09)

  
  Physiological tolerance Summary
Tolerance levels are determined by government agencies such as the Environmental Protection Agency (EPA) and the Food and Drug Administration (FDA), and are based on the results of testing, primarily animal testing.
Tolerance levels also are criticized for not recognizing threats to at-risk populations such as children, the elderly, and pregnant women.
It is also commonly encountered in pharmacology (see drug tolerance), when a subject's reaction to a drug (such as a painkiller or intoxicant) decreases so that larger doses are required to achieve the same effect.
www.bookrags.com /Physiological_tolerance   (1576 words)

  
 Drug tolerance - Wikipedia, the free encyclopedia
Drug tolerance occurs when a subject's reaction to a psychopharmaceutical drug (such as a painkiller or intoxicant) decreases so that larger doses are required to achieve the same effect.
Tolerance may be related to the familiarity of "drug onset cues".
Many law enforcement and civic agencies (such as schools and scouting groups) advocate a zero tolerance policy towards drugs, meaning that any infraction of existing laws and regulations will be punished, no matter how small.
en.wikipedia.org /wiki/Drug_tolerance   (284 words)

  
 Xanax or Toprol--what's the real difference?
This can lead to physiological dependence, which means that you need more and more as time goes on (that's called tolerance), and that you suffer uncomfortable withdrawal symptoms if they are stopped or tapered too quickly.
Such physiological dependence may lead to outright abuse and addictive behavior, although this is not always the case.
The possibility of your developing physiological dependence (tolerance and withdrawal symptoms) may be less for people taking intermediate half-life anti-anxiety agents such as lorazepam (Ativan), although doctors may have some very good reasons for selecting short-acting agents.
www.medhelp.org /forums/addiction/archive/103.html   (540 words)

  
 Links
My research focuses on the physiological adaptations that enable marine and estuarine organisms to live under potentially stressful environmental conditions.
A general approach in my research is to combine field measurements of environmental conditions with laboratory investigations that delineate the physiological and biochemical mechanisms that enable organisms to respond to environmental challenges.
I. Chemoautotrophy and sulfide tolerance in marine invertebrates
www.wsu.edu /~rlee   (1534 words)

  
 Drug Tolerance Responds To Learned Cues
Drug tolerance makes people need more and more drug to get the same effect, whether pain relief or a "high." Its newly discovered psychological aspect -- in which a drug-predictive cue primes the body to react "as if" the drug effect is imminent -- might be used to treat addiction more effectively.
In short, if drug tolerance can be learned, there is a chance it can be unlearned, reducing or eliminating the tolerance-related cravings and other withdrawal symptoms that can lead addicts to relapse.
This probe dose usually is too small to have any effect, but, in rats that had prior experience with larger infusions of morphine, it replicated the drug onset cue - - a cue that previously had occurred shortly before the drug's peak effect.
www.apa.org /releases/drug_tolerance.html   (1107 words)

  
 Evolution of Physiological Tolerance and Performance During Freshwater Invasions -- Lee et al. 43 (3): 439 -- ...   (Site not responding. Last check: 2007-11-03)
Evolution of Physiological Tolerance and Performance During Freshwater Invasions -- Lee et al.
tolerance and a reduction in high-salinity tolerance relative
For copepods, 5 to 8 PSU serves as a biogeographic and physiological
icb.oxfordjournals.org /cgi/content/full/43/3/439   (5313 words)

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