antagonist

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antagonist

1. any muscle that opposes the action of another
2. a drug that counteracts the effects of another drug

antagonist

[an′tag·ə‚nist]
(biochemistry)
A molecule that bears sufficient structural similarity to a second molecule to compete with that molecule for binding sites on a third molecule.
(pharmacology)
A drug or other chemical substance capable of reducing the physiological activity of another chemical substance; refers especially to a drug that opposes the action of a drug or other chemical substance on the nervous system by combining with and blocking the nerve receptor.
(physiology)
A muscle that contracts with, and limits the action of, another muscle, called an agonist, with which it is paired.
References in periodicals archive ?
The studies about the effects of smoking, which has negative effect on body systems, on the muscle relaxant that are used in anesthesia application very often and on the drugs which are used to antagonize the muscle relaxant and the studies which show the necessity of quitting smoking that gives big harm in the country's economy and human health, showing the complications due to smoking have great value.
Enhanced GABAergic tone via neurosteroid-induced allosteric activation of GABAA receptors is emerging as critical to the pathogenesis of HE, prompting efforts to develop agents that antagonize GABAA receptor-potentiating neurosteroids 1 .
Curcumin (diferuloylmethane) is an anti-inflammatory phytochemical agent that has recently been shown to antagonize the pro-inflammatory effects of cytokines in chondrocytes and other cells.
To further antagonize Pakistan unnecessarily is not something I would particularly think is appropriate," said the top Republican on the Senate Armed Services Committee.
However, viruses, and especially HIV-1, have evolved and developed mechanisms that antagonize this restriction factor.
At least the Bush Administration was prepared to antagonize allies only on issues that really mattered.
I openly say that we have never antagonized anyone and we will not antagonize those who colluded on us.
The case has resulted in battle lines between the two families, with both saying the other was trying to antagonize them.
The success of viruses is explained, at least in part, by the acquisition of viral genes during evolution that antagonize the host immune response.
One marvels at Zaki's mastery while shuddering at the implications of these spaces that not only no longer protect but now actively obstruct and antagonize the dreamer.
Inappropriate or unprofessional clothing that defies convention can distract or even antagonize a jury.
That's "like tipping your hat to gays while trying not to antagonize other voters," Stanton explained.