I would assume that's where you would get it....i just remember using it as a kid...tastes horrible but works great!.....when i was a kid it was in an orange and white container with a metal lid....that's about all i can tell ya...sorry...i don't get cankersores very often anymore so if i do i just do the salt wash thing now.
As for the glands....i think cankersores can be a sign of a weekend immune system, i know as a kid soon after a cankersore appeared often i would get sick....straight taking your vitamins now!