Trional (Methylsulfonal) is a sedative-hypnotic[1] and anesthetic drug with GABAergic actions[citation needed].

It has similar effects to sulfonal, except it is faster acting.

[2] Trional was prepared and introduced by Eugen Baumann and Alfred Kast in 1888.

[3] Appeared in Agatha Christie's Murder on the Orient Express, And Then There Were None, and other novels such as John Bude's The Lake District Murder as a sleep-inducing sedative; and in In Search of Lost Time (Sodom and Gomorrah) by Marcel Proust as a hypnotic.

Sax Rohmer also references trional in his novel Dope.