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This article is about the mouthwash and tonic. For the unrelated oil used in bodybuilding, see Synthol (bodybuilding).

Synthol is a supplement available in France since 1920. It was developed by Maurice Bunau-Varilla, a prominent newspaper publisher of the early twentieth century. He promoted it as a cure-all tonic.[1]

The formula consists of chloral hydrate, menthol, veratrol, resorcinol and salicylic acid. Sold mainly as a mouthwash in a distinctive black carton, it is also packaged as a gel and spray for the treatment of muscular pain(s).


  1. ^ Pinsole, Dominique (August 2009). "Le Synthol, moteur de l'histoire". Le Monde diplomatique (in French).