Apronal

Apronal, or apronalide, also known as allylisopropylacetylurea or allylisopropylacetylcarbamide, is a hypnotic/sedative drug of the ureide group synthesized in 1926 by Hoffmann-La Roche. Though it is not a barbiturate, apronal is similar in structure to the barbiturates. In accordance, it is similar in action to the barbiturates, although considerably milder in comparison. Upon the finding that it caused patients to develop thrombocytopenic purpura, apronal was withdrawn from clinical use.
Medicines with apronal are no longer used except in Japan and South Korea. 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.