answersLogoWhite

0

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

User Avatar

Wiki User

16y ago

What else can I help you with?