Gray's Balsam for the Throat and Lungs, Contains: Tincture of Cannabis

"Cannabis indica is one of the best additions to cough mixtures that we possess, as it quiets the tickling in the throat, and yet does not constipate or depress the system as does morphine." - A Textbook of Practical Therapeutics, (1922, p. 181), by Hobart Hare.

In Thailand....[t]raditionally, hemp has been used as a sedative and to treat painful indigestion, cancer, ulcers, migraines, neuralgia, and rheumatism. A cough medicine is prepared from dried hemp chopped on a board made of the wood of the nux vomica tree (Strychnos nux-vomica). Hemp is mixed with shavings of this wood, which contains strychnine. This medicine is also made in Cambodia.

Excerpt from Christian Rätsch's Marijuana Medicine: A World Tour of the Healing and Visionary Powers of Cannabis, (1998, 2001 [English Translation], p. 51)

Image from Hash Museum, Barcelona

Explore the history of cannabis as a cough and cold medicine while checking out the competition at the same time here, here, and here.