I suffered from daily SUI ideation for the past 19 years until I recently was put on Latuda for impulsivity of my thoughts.

You do not have to be depressed if you have SUI thoughts. If you have suffered from depression in the past and had SUI ideation then, then you can still have SUI thoughts when you're not depressed. Your brain got used to having those thoughts, so it developed a neural connection. It became a habbit, a pattern. The only way to reduce them if this is why you have them is to develop new neural pathways/connections and/or medication.

I can honestly say though that I never thought I'd be free of the thoughts and am so grateful that after 19 years I have some peace. They still come up when I'm depressed, but they don't exist when I'm not depressed: both the SUI and SI thoughts.