system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can a medication cause such a specific side effect as thoughts of suicide?
gpt
Depression comes with not being able to make decisions or having the emotional/physical energy to carry out plans or activities. Medications that treat this often improve your energy levels and ability to follow through with ideas before they start improving the things that make you suicidal. 

Also anything that messes with brain chemistry can make you unbalanced and suicidal.