“Related products” are also referred to in the pharmaceutical product definition. In terms of its intention, for example, if you look at the contraceptives, you will find that some of the products that are contraceptives are actually medical devices, like intrauterine devices. That's the idea with the term “related products”.
Similarly, there could be drug coverage for something like syringes, if that was chosen. Again, that's not a pharmaceutical product, so that's why that term is used.