ataractic drug

NOUN
14 LETTERS · STARTS WITH A

ataractic drug is a valid 14-letter word worth 19 points in Scrabble and 23 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
A1T1A1R1A1C3T1I1C3D2R1U1G2
1 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 3 + 0 + 2 + 1 + 1 + 2 =19 PTS
DOUBLE WORD → 38TRIPLE WORD → 57
MEANING

What does ataractic drug mean?