The Merck Index: An Encyclopedia Of Chemicals, ... May 2026

: Vitamins, hormones, proteins, and plant extracts.

: Approved and investigational drugs, including dosages and pharmacological profiles. The Merck Index: An Encyclopedia of Chemicals, ...

: First published in 1899 by Merck & Co. as a catalog of medicinal substances. : Vitamins, hormones, proteins, and plant extracts