Terms of Service are universally wishlists of things a legal department may wish to enforce if they are so inclined. In this case, they are not so inclined.
e.g. for the Moderna Covid vaccine, PDF, see "Possible side effects": https://www.ema.europa.eu/en/documents/product-information/s...
(I looked up St John's Wort, but its assessment doesn't have this. Possible because it is from a long time ago.)