Petrichloral
Encyclopedia
Petrichloral is a sedative
Sedative
A sedative or tranquilizer is a substance that induces sedation by reducing irritability or excitement....

 and hypnotic
Hypnotic
Hypnotic drugs are a class of psychoactives whose primary function is to induce sleep and to be used in the treatment of insomnia and in surgical anesthesia...

 drug related to chloral hydrate
Chloral hydrate
Chloral hydrate is a sedative and hypnotic drug as well as a chemical reagent and precursor. The name chloral hydrate indicates that it is formed from chloral by the addition of one molecule of water. Its chemical formula is C2H3Cl3O2....

. It is a Schedule IV drug in the USA.
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