Leonard, what if you have
an ALLERGIC reaction...
The Big Bang Theory Season 8, Episode 9
...he's ALLERGIC to Earth nuts,
but I'm the alien.
The Big Bang Theory Season 8, Episode 21
My friend
is having ALLERGIC reaction to peanuts.
The Big Bang Theory Season 1, Episode 16
It has avocado on it.
She's ALLERGIC to avocado.
The Big Bang Theory Season 8, Episode 3
I'm ALLERGIC.
The Big Bang Theory Season 5, Episode 23