The following classification is taken from "Introduction to Materia Medica and Pharmacology" by Oliver T. Osborne.

Drugs and Preparations Which May Cause an Eruption on, or Itching of, the Skin: Antitoxin Arsenic Belladonna Bromids Chloral Copaiba Iodids Opium Quinin

Salicylic Acid Synthetic Compounds Volatile Oils, and drugs containing them.

Drugs Which May Change the Color of the Urine:

Drugs that increase its amount cause it to be lighter. Drugs that irritate the kidneys cause it to be darker. Methylene-blue causes it to be green, if acid. Phenol may cause it to be brown (same appearance as bile). Santonin causes it to be yellow, if acid; purple, if alkaline. Senna may cause it to be red, if acid; yellow, if alkaline. Sulphonal may cause it to be very dark.

Drugs Which Color the Feces :

Bismuth salts color them black or dark gray. Colchicum colors them greenish. Iron colors them black. Mercury colors them green. Purgatives cause them to be darker.

Drugs Which Are Excreted with the Milk:

Arsenic

Bromids

Hexamethylenamin

Iodids

Lead

Mercury

Opium

Quinin

Sulphur

Vegetable Cathartics

Volatile Oils