A white crystalline alkaloid occurring in opium or synthesized from morphine, used as a narcotic analgesic and cough suppressant. Also: a tablet…

The drug codeine.

A thin colourless oily liquid with a pungent odour, first obtained by Liebig by the action of chlorine upon alcohol; = trichloraldehyde (C…

A colourless liquid, (CH3CHO)3, which is made by treating ethanal (acetaldehyde), of which it is a cyclic trimer, with acid, and is used…

A name given to acetophenone, C6H5.CO.CH3, as a hypnotic.

A compound that results from a condensation reaction of chloral with an acid amide; spec. chloral formamide, CCl3·CH(OH)·NH· CHO, a mild hypnotic.

Diethyl-sulphone-dimethyl-methane, a white crystalline substance, used as a hypnotic.

= ural, n.2

A preparation of chloral hydrate and urethane, used as a hypnotic; chloral-urethane; = uralium, n.

A trade name of acetaminothymol, a colourless crystalline compound, used as a hypnotic.

A compound of chloral and glucose, C8H11Cl3O6, having hypnotic properties. Also attributive.

A white crystalline substance, (CH3)2C(OH)CCl3, tasting like camphor, used as a local anæsthetic and a hypnotic.

A white crystalline compound, C6H13O2N, that has been used as a hypnotic and an anæsthetic; methyl-propyl-carbinol urethane.

Diethyl-malonyl-urea, a white crystalline substance used as a hypnotic. Also attributive.

A barbiturate drug, C8H11N2NaO3, with properties and uses similar to those of barbitone, of which it is the sodium salt. Also called barbitone sodium.

A hypnotic drug, diethyl barbituric acid, often known by the trade name veronal, n.

The equivalent in the U.S. Pharmacopœia of barbitone, n.

A proprietary term for N-(2-isopropylpent-4-enoyl)urea, C9H16N2O2, a white crystalline solid employed as a sedative and hypnotic.

Any compound whose molecule contains a benzene ring fused to a seven-membered ring containing two nitrogen atoms; spec. any of a group of such…

The equivalent in the U.S. Pharmacopœia of hexobarbitone, n.

A short-acting barbiturate, C12H16N2O3, with hypnotic properties; also known by proprietary names, as Evipal, Evipan; loosely, = hexobarbitone sodium…

A colourless, odourless crystalline compound with hypnotic properties.

The sedative and hypnotic drug ethchlorvynol. Also as a count noun: a dose (in tablet form) of this drug.

The drug nitrazepam, used to treat insomnia; a tablet of this.

A benzodiazepine, C16H14ClN3O, given in tablet form and by injection in the treatment of anxiety and as a hypnotic.

A sedative drug of the benzodiazepine group, used as a hypnotic and antiepileptic; 1,3-dihydro-7-nitro-5-phenyl-2H-1,4-benzodiazepin-2-one…

A long-acting benzodiazepine, C21H23ClFN3O, with sedative properties, which is widely prescribed (usually in tablet form as the hydrochloride) as…

A benzodiazepine, C16H15ClN2, given orally (sometimes as the hydrochloride) as a mild tranquillizer in the treatment of anxiety-related conditions.

A benzodiazepine, C15H10Cl2N2O2, which is used as a tranquillizer and hypnotic.

A proprietary name for: flunitrazepam, a sedative and hypnotic drug of the benzodiazepine class. Also (as a count noun): a tablet of this drug.

A short-acting benzodiazepine derivative with relatively long-lasting sedative effects, used as a hypnotic and as a premedication for…

A short-acting hypnotic drug of the benzodiazepine group, C17H12Cl2N4, which is given orally in tablet form in the treatment of insomnia and as a…

A pyridine derivative once used as an antihistamine and hypnotic, but later recognized to be a potent hepatic carcinogen in rats…

A proprietary name for: the sedative drug triazolam, used to treat insomnia; (also) a tablet of this drug.