Suicide

Suicide is the act where an individual ends his or her own life, whether intentional or by accident. This could be done by a variety of methods.

Known instances of suicide

 * Kevin Elliot /Lantash; In 2001, he was gravely injured during a Goa'uld attack on a Tok'ra base in Revanna. Host to Lantash at the time, his injuries proved too servere. Elliot got his hands on symbiote poison, waited for a Jaffa patrol, who took him to the area of the Stargate; he released the poison, killing every Jaffa to give SG-1 enough time to escape. Lantash and his host died in the process.
 * Daniel Jackson; became exposed to lethal amounts of radiation saving the Langaran people from a massive explosion from an experimental naquadria bomb in 2002. He later ascended, then de-ascended a year later, returning to health.
 * Brendan Gall; In 2005, he was partially fed on by a Wraith survivor. Not wanting to spend his last hours in severe pain, he shot himself with the sidearm Rodney McKay gave him.
 * Alan Armstrong; In 2009, Armstrong became injured evacuating Icarus Base. After arriving on Destiny, he began bleeding internally; blood thinners from his heart medication made it worse. Knowing he has little time, and that everyone else will die from the lack of air, he gets into an Ancient shuttle, which is leaking air out, and the door could only be closed from the inside. He closed the door upon entering, saving everyone else for some time, while sacrificing his own.
 * Spencer; he became dependant on sleeping pills, which deteriorated his mental state, including anger and suicidal tendancies. After weeks of ending up stranded on Destiny, Spencer shoots himself in the head with a handgun.