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gr is the abbreviation for the apothecary measurement grain VIISS is 7 1/2 (the Roman Numeral for 7 is VII and Roman Numeral for 1/2 is SS) There are 60mg (milligrams) is one grain, therefore.....gr VIISS = 450mg

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16y ago

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7.5 =1 gr (grVIIss= gr=grain, VII=7(roman numerals) ss=1/2 or .5

1gr =60mg

7.5gr x 60mg = 450mg

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Toni Fox

Lvl 2
3y ago
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Q: How much is gr viiss?
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