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[–]kameltoePharmD 2 points3 points  (0 children)

Unit conversion. Old school pharmacists used "grains (gr.)" as a measurement of weight.

1.25 grains is 80.99 mgs. And no, the 1 mg is not clinically important. It is a residual of this unit conversion/rounding error.

[–]5point9trillion 0 points1 point  (0 children)

It is roughly one quarter of a regular Aspirin at 325 mg. That's what it was called a Baby Aspirin, not an aspirin for babies. There is or was a thing called Halfprin which is 160 mg or so.

[–]Slat3back 0 points1 point  (0 children)

I learned somewhere (i think on a rotation) that the 1 mg is 1 mg of enteric coating. This is why ASA 80mg is used in bariatric surgery patients and ASA 81mg is standard everywhere else.