“The spasmolytic drugs papaverine, phenpropamine, Cxn 2 (1‐methyl‐amino‐3,3,5‐trimethylcyclohexane), khellin, cyclandelate, magnesium chloride , cocaine, 2,4‐dinitrophenol and KCN antagonize various types of spasmogens, such as acetylcholine or histamine, non‐competitively.”