Chloroform

Chloroform was an organic compound. According to the Eighth Doctor, an American colonel wanted anyone buried without an autopsy being performed to have a bottle of chloroform interred with them so if they revived suddenly they could commit suicide painlessly and quickly. Ian Stratford commented that such things would never happen in England. (PROSE: The Banquo Legacy) Time Lords could be rendered unconscious by chloroform. (PROSE: Just War)