for now, you can craft things to reduce madness, and the Counsellor crews will be fixed in todays update, which will mitigate those effects substantially.

there will be ways to kill madness as well.

What items can already reduce madness?

Neat! Right now it's a pain to remove Madness and get it to 0 so it stops doing creepy/weird ♥♥♥♥ to you. Looking forward to that!
It's fine as a intentional effect when really stacking up, but... Well, sometimes it's unwanted, so it should be easy to remove, probably even for newer players should they make the mistake of gaining a bunch on say, a first-time visit on an Athropus planet (and should be easy to figure out too, such as having S.A.I.L mention a easily-crafted cure).

That or it'd be neat if it didn't do weird stuff to you as long as it was low/empty and always lowered to a "safe" threshold with no unwanted creepy or counter-productive effects. Not everyone likes going mad, with hearing like mine, those whispers and heartbeats get very... stressful... :P

For now my solutions to removing it have revolved entirely around spending it so there's 0 left. Such as gaining enough to do a new research, like needing say 1200 for a research, so i get like 1230, i wait a bit and let it drop to 1200 (it appears to only start dropping once you get past 1000 or so) and do the research and end back safely to 0!
Or making stuff that spends madness helps reduce it, although this is harder to do due to resources. Remarkably difficult too, to get to a round number so i can craft to spend it back to 0.

Hm, though so far i haven't found ways to accuire Madness beyond exploring maddening places, using those crafted lab notes, and autopsies on corpses...

That wont be a problem in the update coming now.

Good update, problem solved.

I noticed that the new system of psychologists has a bug. If the level of madness is less than the psychologist removes in one tick, it can not be reduced. Of course it now does not grow over time and this is not a big problem, but it is desirable to solve it.