Bayer 81 milligram aspirin pills are round, yellow and approximately 5 millimeters in diameter with the imprint "81." Chewable Bayer 81 milligram aspirin pills appear similar, except they are orange with the imprint "Bayer," according to DailyMed. Neither pill is scored.
People take Bayer 81 milligram aspirin tablets to relieve minor aches and pains, explains DailyMed. Individuals over the age of 12 may take four to eight tablets every four hours for a maximum of 48 tablets in 24 hours. Individuals should take each dose with a full glass of water. Children under the age of 12 should not take Bayer aspirin unless directed by a doctor.