The medkit used to grant temporary poison immunity, so the message wasn't talking about when you should have used it, since if you used it, you would have been immune at least long enough to get back to base. It still cures poison but it's a little silly to mention medkit in the poison message now.
A better message would be "UnnamedPlayer ate a bad egg"
(a poor attempt at humor for the 2 people who got the other reference)