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Quinine is an alkaloid, a naturally occurring chemical compound. [5] How it works as a medicine is not entirely clear. [5] Quinine was first isolated in 1820 from the bark of a cinchona tree, which is native to Peru, [5] [9] [10] and its molecular formula was determined by Adolph Strecker in 1854. [11]
In the United States, the US Food and Drug Administration (FDA) limits the quinine content in tonic water to 83 ppm [8] (83 mg per liter), while the daily therapeutic dose of quinine is in the range of 500–1000 mg, [9] and 10 mg/kg every eight hours for effective malaria prevention (2,100 mg daily for a 70-kilogram (150 lb) adult). [10]
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With paroxysmal nocturnal dyspnea specifically, it is felt while sleeping and causes a person to wake up after about 1 to 2 hours of sleep. [ 3 ] More serious forms of dyspnea can be identified through accompanying findings, such as low blood pressure, decreased respiratory rate, altered mental status, hypoxia, cyanosis, stridor, or unstable ...
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Dihydroquinine, also known as hydroquinine [1] or DHQ, is an organic compound and as a cinchona alkaloid closely related to quinine. The specific rotation is −148° in ethanol. A derivative of this molecule is used as chiral ligand in the AD-mix for Sharpless dihydroxylation.
An Australian livestreamer was banned from multiple platforms for trying to stay awake for 12 days to break a Guinness World Record that is no longer being tracked due to health concerns.
There is one study supporting the use of a novel combination of dextromethorphan and low dose quinidine in alleviating symptoms of easy laughing and crying (pseudobulbar affect); these are a type of rather severe uncontrollable behaviors which can be present in various neurological pathologies such as amyotrophic lateral sclerosis and multiple sclerosis.