As part of a mod I am working on I've created a bunch of potions and poisons which can be brewed in-game but cannot be bought anywhere.

So I made levelled lists for them, but do I also have to add these to merchant and apothecary chests?

What would be the best way to do this as I don't want to create any conflicts with any other mods I am using?

Also, how would I get them to randomly spawn at low-ish frequency in NPC's inventory, dungeon chests etc?

Cheers!