How is this legal?

I was cleaning through m medicine cabinet last week when my boys had poison ivy. I came across a package of Benadryl tablets that look hot pink and contain. D & C red #27. I found that interesting as I know only red #40 and Red #33 are approved for food. Tuns out this one's in lipstick and lip gloss despite it being known as a neurotoxin. Check out the link I found about that: http://www.cosmeticsdatabase.com/ingredient.php?ingred06=701794&nothanks=1

Now obviously I threw it all out before anyone in my family could accidentally take it, but how many people take that on a regular basis? Hmmmm.