The United Drug Co. was originally in Boston around the turn of the century. I found them listed in Toronto Canada prior to that time. According to Devner, the company became known as Rexall Laboratories in 1903, and Rexall Drug Co., in 1920. The label on the bottles said it was "for dandruff and falling hair, and stimulates the growth of the hair." It also indicated that the product was 25% alcohol.