The Smart Tab ez Refill / First Aid Exchange Kit refills - Extra-Strength Non-Aspirin, 2 tablets per pkg/10 pkgs of 2 tablets Comparable to Extra-Strength Tylenol, our extra-strength non-aspirin pain reliever offers temporary relief of a variety of minor aches and pains due to arthritis, rheumatism, bursitis, headache, menstrual cramps and overexertion. Also reduces fever. Active ingredient: Acetaminophen, 500 mg.