Dr. Guertin's Nerve Syrup

Dr. Guertin's Nerve Syrup was a patent medicine sold by Kalmus Chemical Co. (of Cincinnati), promoted as a treatment for diseases of the nervous system, and particularly as an epilepsy cure. Although it was sold under Dr. A. L. Guertin's name, the product was largely the creation of Otto Kalmus, who had previously engaged in a mail scam offering treatment of epilepsy through his Epileptic Institute, prior to its being banned as fraudulent by the Postal Service in 1908.

Composition
A 1915 A.M.A. chemical analysis of the syrup found it to be a bromide solution – potassium, sodium, and ammonium – mixed with sugar, glycerine, and (colored) water.