<prompt> Drugs acting directly on the uterus are using for criminal aboion. All of the following are drugs which increases uterine contraction, EXCEPT:ArsenicNux vomicaErgotamineQuinine  <response>: Drugs which increase uterine contraction: Ergot Hydrastis canadensis Quinine Lead Pituitary extract Decoctions of cotton root bark, nitrobenzol, picrotoxin, and strychnine Nux vomica Ref: The Essentials of Forensic Medicine and Toxicology by Dr. K. S. Narayan Reddy, 27th edition, Page 374. 