Apronal

Apronal (brand name Sedormid), or apronalide, also known as allylisopropylacetylurea or allylisopropylacetylcarbamide, is a hypnotic/sedative drug of the ureide (acylurea) group synthesized in 1926 by Hoffmann-La Roche. Though it is not a barbiturate, apronalide is similar in structure to the barbiturates (being an open-chain carbamide instead of having a heterocyclic ring). In accordance, it is similar in action to the barbiturates, although considerably milder in comparison (formerly used as a daytime sedative at doses of 1 to 2 grams every 3 to 4 hours). Upon the finding that it caused patients to develop thrombocytopenic purpura, apronalide was withdrawn from clinical use.

Medicines with allylisopropylacetylurea are no longer used except in Japan. Notably Australian Therapeutic Goods Administration issued a safety alert in May 2023 which prohibits the sale, supply and use of Japanese EVE-branded products in Australia due to its dangerous side effects.