in a double-blind , randomized controlled trial among 500 post-partum patients experiencing moderate to severe pain , a single oral dose of an aspirin/caffeine combination ( 800 mg aspirin , 65 mg caffeine ) provided significantly more pain relief at 2 hours than did a higher dose of an acetaminophen/aspirin combination ( 648 mg acetaminophen , 648 mg aspirin ) and a higher dose of acetaminophen alone ( 1000 mg acetaminophen ) .
C0717442
aspirin/caffeine
C0004057
aspirin