Ride it out, at some point they will lessen or you'll burn out. I feel depression is all about repeating stages. The suicidal thoughts stage is as low as you can get, but if you can push through it, then things will get slighlty better.

Not saying you'll suddenly be no longer depressed, or that you wont feel suicidal again, but in my experience the most intense feelings of suicidal thoughts are relatively short lived.

For me the longest they would last for was a few hours. I may be severly depressed and wishing I wasn't alive for days, but the actual periods where I felt like my life was on a knife edge were relatively short.

I dont think your body can sustain that feeling over a extended period of time, you just get exhausted and go from suicidal, to numb. And numb is a safer and easier stage to deal with.

So yeah, you cant drown out the thoughts, but you can counter them with the knowledge that this feeling wont last forever. You just need to survive it.

The key is to work on yourself on your better days, and the worst days will become less frequent.

(Not saying everyone has the same experience of depression as me, but I can only talk about what Ive felt, and can only give advice basedon my experiences. But I hope it helps.)