Interaction checker
Build a stack and see what is actually documented about combining it, sourced to a regulator label or an indexed study. Where nothing is documented, this says so and explains whether that means tested-and-clear or, far more often, never tested.
Add a compound to check it.
This checks what you add against documented interactions from regulator labels and indexed studies. It will tell you plainly when a compound has never been studied for interactions at all, which is the case for most of this library.