psychoactive drug

NOUN
17 LETTERS · STARTS WITH P

psychoactive drug is a valid 17-letter word worth 33 points in Scrabble and 37 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
P3S1Y4C3H4O1A1C3T1I1V4E1D2R1U1G2
3 + 1 + 4 + 3 + 4 + 1 + 1 + 3 + 1 + 1 + 4 + 1 + 0 + 2 + 1 + 1 + 2 =33 PTS
DOUBLE WORD → 66TRIPLE WORD → 99
MEANING

What does psychoactive drug mean?