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checking or preventing fever.
an antipyretic agent.
Historical Examples

Perhaps its antipyretic effects are limited to those cases in which malaria is a known or an unknown complication.
A System of Practical Medicine by American Authors, Vol. I Various

The antipyretic medicines which we have first to consider are derivatives of quinoline.
Coal Raphael Meldola

When the fever is so excessive that quinia should be given as an antipyretic.
A System of Practical Medicine by American Authors, Vol. I Various

I have given quinia as an antipyretic, but never in doses of more than a scruple.
A System of Practical Medicine by American Authors, Vol. I Various

It was found that substituting ethyl for H in the imid group annihilated the narcotic and antipyretic properties.
Poisons: Their Effects and Detection Alexander Wynter Blyth

(Analgesic and antipyretic): 16—32 ♏, pure or with equal parts glycerin or oil.
Merck’s 1899 Manual Merck & Co.

The acid and its salts are antipyretic and were used in Germany instead of salicylates in rheumatic fever.
Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 6 Various

In men doses of half a gramme (7·7 grains) act as an antipyretic, relieve neuralgia and have weak narcotic effects.
Poisons: Their Effects and Detection Alexander Wynter Blyth

As a tonic and antipyretic it is certainly worthy of recommendation.
The Medicinal Plants of the Philippines T. H. Pardo de Tavera

The decoction is used internally as an antipyretic in fevers and in dysentery.
The Medicinal Plants of the Philippines T. H. Pardo de Tavera

adjective
preventing or alleviating fever
noun
an antipyretic remedy or drug

“reducing fever; that which reduces fever,” 1680s, from anti- + Greek pyretos “fever, burning heat,” related to pyr “fire” (see fire (n.)) + -ic.

antipyretic an·ti·py·ret·ic (ān’tē-pī-rět’ĭk, ān’tī-)
n.
An agent that reduces or prevents fever. Also called antifebrile, antithermic. adj.
Reducing or preventing fever.
an’ti·py·re’sis (-rē’sĭs) n.