I think those examples are very salient.
I'll give you another example with St. John's wort. It's a product often used for mood disorders or anxiety, but it can change the levels of some antidepressants in the body. As you noted, there are also some vitamins that can predispose people to increased clotting. There's a lot of interaction.
Again, it's not just in natural health products. We have foods with interactions. Grapefruit juice is the classic example. There are a lot. Any product that can have an effect in the body could potentially have a negative effect. Then there's a whole series of products that could have interactions with other pharmaceuticals as well, or other health products.