Suicide pill
A suicide pill (also known as the cyanide pill, kill-pill, lethal pill, death-pill, cyanide capsule, or L-pill) is a pill, capsule, ampoule, or tablet containing a fatally poisonous substance that a person ingests deliberately to achieve death quickly through suicide. Military and espionage organizations have provided their agents in danger of being captured by the enemy with suicide pills and devices which can be used to avoid an imminent and far more unpleasant death (such as through torture), or to ensure that they cannot be interrogated and forced to disclose secret information.