
Ricin.
It's an extremely EFFECTIVE poison.
Breaking Bad Season 2, Episode 1

Placinex proved
extremely EFFECTIVE in treating
The Big Bang Theory Season 9, Episode 12

I was able to take
an EFFECTIVE shot.
Breaking Bad Season 2, Episode 3

SHELDON:
It was obviously EFFECTIVE.
The Big Bang Theory Season 1, Episode 16

one of the most EFFECTIVE
techniques for moving on
The Big Bang Theory Season 7, Episode 20