Alka-Seltzer® Analgesic combined (NSAIDs + antacids) The effervescent tablets are 324 mg + 965 mg + 1625 mg. Aspirin® Non-steroidal anti-inflammatory drug (NSAID) Tablets 500 mg. Aspirin®-C Non-steroidal anti-inflammatory drug (NSAID) + vitamin Tablets effervescent 400 mg + 240 mg. Aspirin® Cardio Antiaggregant agent Tablets coated with enteric coating 100 mg, 300 mg.