<P> The dram (alternative British spelling drachm; apothecary symbol ʒ or Z; abbreviated dr) is a unit of mass in the avoirdupois system, and both a unit of mass and a unit of volume in the apothecaries' system . It was originally both a coin and a weight in ancient Greece . The unit of volume is more correctly called a fluid dram, fluid drachm, fluidram or fluidrachm (abbreviated fl dr, ƒ 3, or fʒ). </P> <Ul> <Li> The Attic Greek drachma was a weight of 6 obols, ⁄ Greek mina, or about 4.37 grams . </Li> <Li> The Roman drachma was a weight of ⁄ Roman pounds, or about 3.41 grams . </Li> </Ul> <Li> The Attic Greek drachma was a weight of 6 obols, ⁄ Greek mina, or about 4.37 grams . </Li> <Li> The Roman drachma was a weight of ⁄ Roman pounds, or about 3.41 grams . </Li>

What does 10 dram mean on a prescription