Yes, ASPIRINS is a Scrabble word!

Letter values in Scrabble US: A 1, S 1, P 3, I 1, R 1, I 1, N 1, S 1.

Is it a valid word?

ASPIRINS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

the acetylated derivative of salicylic acid; used as an analgesic anti-inflammatory drug (trade names Bayer, Empirin, and St. Joseph) usually taken in tablet form; used as an antipyretic; slows clotting of the blood by poisoning platelets

Also: acetylsalicylic acid, st. joseph.

Not playable in Scrabble US: BAYER, EMPIRIN.