Prescription balances Are scales or balances specially designed to weigh medical drugs and other substances required in doctor’s prescriptions for the preparation and use of a medicine or remedy. The balances are constructed to repeated weighings of the capacity load without stresses. The scaleor balance have leveling adjustable feet, may feature dial-in weights and precision springs, and dial instead weighbeam. A balance that has graduated weighbeam must have stop that halts the rider or poise at the zero point. The reading edge of the rider is parallel to the graduations on the weigh-beam. The distance from the face of the index plate to the indicator pointer should be no more than 1.0 mm; the point should be sharp and will indicate thescale is in perfect balance.