An antagonist is a drug that binds to a RECEPTOR (i.e., it has affinity for the receptor binding site) but does not activate the receptor to produce a biological response (i.e., it possesses no intrinsic activity). Antagonists are also called receptor...

An antagonist is a DRUG or chemical that binds to a RECEPTOR and blocks it, preventing it operating normally. It may be a COMPETITIVE ANTAGONIST (also known as SURMOUNTABLE ANTAGONIST) (that is, they compete with the natural LIGAND and AGONIST for...

In literature, the antagonist is that against which the main character or protagonist contends. [1] An antagonist is often a Villain, but may be a force of nature, set of circumstances, an animal, or other force that is in conflict with the...

Health officials repeated safety concerns about an experimental group of HIV drugs Friday, days before government advisers will recommend whether the first drug from the class merits approval.Pfizer Inc. seeks Food and Drug Administration approval for maraviroc, potentially the first in a novel group of...

Health officials repeated safety concerns about an experimental group of HIV drugs Friday, days before government advisers will recommend whether the first drug from the class merits approval.Pfizer Inc. seeks Food and Drug Administration approval for maraviroc, potentially the first in a novel group of...

Paula Abdul says she and Simon Cowell, who torments her on the set of "American Idol," are chummy in real life. "Simon and I actually get along great," the 44-year-old "Idol" judge says in an interview in TV Guide magazine's March 19 issue. "We have...

China has secretly issued an order banning those the government considers a threat from next year's Olympics — a group that includes terrorists, Falun Gong activists, some media workers and frequent traffic-law violators, an overseas monitoring association said Friday.China's leaders view the Beijing Olympics as...