Definitions for Potencyˈpoʊt n si
This page provides all possible meanings and translations of the word Potency
authority, authorization, authorisation, potency, dominance, say-so(noun)
the power or right to give orders or make decisions
"he has the authority to issue warrants"; "deputies are given authorization to make arrests"; "a place of potency in the state"
potency, effectiveness, strength(noun)
capacity to produce strong physiological or chemical effects
"the toxin's potency"; "the strength of the drinks"
potential, potentiality, potency(noun)
the inherent capacity for coming into being
the state of being potent; a male's capacity to have sexual intercourse
The ability or capacity to perform something.
the quality or state of being potent; physical or moral power; inherent strength; energy; ability to effect a purpose; capability; efficacy; influence
Origin: [L. potentia, from potens, -entis, potent. See Potent, and cf. Potance, Potence, Puissance.]
In the field of pharmacology, potency is a measure of drug activity expressed in terms of the amount required to produce an effect of given intensity. A highly potent drug evokes a larger response at low concentrations, while a drug of lower potency evokes a small response at low concentrations. It is proportional to affinity and efficacy. Affinity is the ability of the drug to bind to a receptor. Efficacy is the relationship between receptor occupancy and the ability to initiate a response at the molecular, cellular, tissue or system level. The response is equal to the effect, or, and depends on both the drug binding and the drug-bound receptor then producing a response; thus, potency depends on both affinity and efficacy. The agonist, the ligand, drug or hormone that binds to the receptor and initiates the response is usually abbreviated A or D. Below a certain concentration of agonist, E is too low to measure but at higher concentrations it becomes appreciable and rises with increasing agonist concentration [A] until at sufficiently high concentrations it can no longer be increased by raising [A] and asymptotes to a maximum Emax.
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