| Term 
 | Definition 
 
        | -constant percentage of drug eliminated per unit time -how most drugs are eiliminated |  | 
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        | Term 
 | Definition 
 
        | time to reduce plasma levels by one half |  | 
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        | Term 
 | Definition 
 
        | how many half lives does it take to reach a steady state? |  | 
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        | Term 
 
        | capacity limited (zero order) elimination |  | Definition 
 
        | -constant amount of drug eliminated per unit time -can cause drug accumulation |  | 
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        | Term 
 | Definition 
 
        | regulatory proteins that interact with a drug or hormone and initiate a cellular response |  | 
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        | Term 
 | Definition 
 
        | -dose that works in 50% of the population 50% of the time.  -threshold dose |  | 
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        | Term 
 | Definition 
 
        | dose below which, no response |  | 
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        | Term 
 | Definition 
 
        | half of possible maximum response |  | 
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        | Term 
 | Definition 
 
        | does to produce 1/2 of the possible maximum response: ED50 |  | 
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        | Term 
 | Definition 
 | 
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        | Term 
 | Definition 
 | 
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        | Term 
 
        | intrinsic activity (i.a.) |  | Definition 
 
        | ___________- the ability to produce a response |  | 
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        | Term 
 | Definition 
 | 
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        | Term 
 | Definition 
 
        | Agonists also have ________ and _________ |  | 
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        | Term 
 | Definition 
 
        | how well the drug fits into binding sites |  | 
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        | Term 
 | Definition 
 
        | how well the drug turns on the receptor after binding |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | a partial agonist in the presence or a full agonist is an ___________ |  | 
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        | Term 
 | Definition 
 
        | drugs that interact with a receptor to produce a response |  | 
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        | Term 
 | Definition 
 
        | these can produce the full response I.A.= 1 |  | 
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        | Term 
 | Definition 
 
        | these can produce a response less than that of full agonists. I.A> 0 and <1 |  | 
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        | Term 
 | Definition 
 
        | these have affinity, no intrinsic activity, block the binding by an agonist to its receptor, blockade can be overcome, and reduce the potency of the agonist |  | 
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        | Term 
 | Definition 
 
        | how well the drug turns on receptors |  | 
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        | Term 
 | Definition 
 
        | how well a drug relieves symptoms |  | 
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        | Term 
 | Definition 
 
        | what is the formula for the therapeutic index? |  | 
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        | Term 
 | Definition 
 
        | What is the formula for the certain safety index? |  | 
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        | Term 
 | Definition 
 
        | the difference between the therapeutic effect and the lethal effect. The further apart the curves are, the safer the drug. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | This tells you how far apart the tails of the curves are, the bigger the number, the safer the drug. |  | 
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