This is a short list of suitable suicide methods. The list only contains the names of substances, not the instructions on how to use them. Do not rely upon any information found in linked webpages unless you have verified them with reliable resources. Do your own research, and understand the risks involved in your attempt. Some methods might permanently damage you if you fail; a few methods need to be supplemented with antiemetic, sedatives, or hypnotics; a very few pose dangers to first responders. Double-check all information in Sanctioned Suicide or Suicide Wiki with independent sources.
Potassium bromate (carcinogen)
Potassium chloride (injection)