\n just as humans dogs can take aspirin baby 81mg or low dose heart same mg adult 320mg\n8 lbs (3.6 kg) 1/2 baby aspirin or less 40 mg\n16 lbs (7.2 kg) 1 baby aspirin 80 mg\n32 lbs (14.4 kg) 1/2 adult or 2 baby 160 mg\n48 lbs (21.6 kg) 3/4 adult or 3 baby 240 mg\n64 lbs (28.8 kg) 1 adult or 4 baby 320 mg\n80 lbs (36 kg) 1 1/4 adult or 5 baby 400 mg\n96 lbs (43.2 kg) 1 1/2 adult or 6 baby 480 mg\n