Yes, I like that drug checker too.

If anything it gives lots of moderate interactions.

Cardizem, as a hint, is a common interactor too.

Quinidine, cimetidine, coumadin, digoxin, carbamazepine are often tested against in drug applications today. So their inserts list interactions with them.

But those are not by far the only problematic ones. Cardizem is one. But the liver enzyme information is huge today compared to only years ago. Most doctors don't consult it at all IMO.
They wait for the pharmacy to catch it. And many pharmacists just blow away and override the moderate interactions or yellow flags. There can be SO MANY of these a day, one cannot call all those doctors and service patients in the same day anymore. That is no excuse, but there are SO MANY flags these days..you can't imagine.