A dose of a little more than a drachm (a teaspoonful) will produce a condition of inebriation lasting for one-half to one hour, but the dose must soon be greatly increased.
The vermifuge is given in the early morning, and should consist of the liquid extract of felix mas, male fern, one drachm in emulsion or in capsules to be followed in half an hour by a calomel purgative.
It may be given in drachm doses with impunity.
Thus foot, digit, palm, cubit, stadium, mile, talent, mina, stater, drachm, obol, pound, ounce, grain, metretes, medimrius, modius, hin and many others mean nothing exact unless qualified by the name of their country or city.
The relation is 258: 229 :: 9:8; but the exact form in which the descent took place is not settled: 1/60 or 129 of gold is worth 57 of silver or a drachm, 1/4 of 230 (or by trade weights 127 and 226); otherwise, deriving it from the silver weight of 86 already formed, the drachm is 1/3 of the stater, 172, or double of the Persian danak of 28.7, and the sacred unit of Didyma in Ionia was this half-drachm, 27; or thirdly, what is indicated by the Lydian coinage (17), 86 of gold was equal to 1150 of silver, 5 shekels or 1/10th mina.
The usual doses of the oxide and carbonate of magnesium are from half a drachm to a drachm.
The dose is from a drachm to an ounce.
A fluid drachm of friar's balsam may be added to a pint of water at a temperature of about 140° F., and the resultant vapour may be inhaled from the spout of a kettle or from a special inhaler.
When the secretion of gastric juice is deficient it may be excited by gastric tonics, such as ten grains of bicarbonate of soda and a drachm of compound tincture of gentian in water shortly before meals, and may be supplemented by the administration of pepsin and hydrochloric acid after meals.
Drachm, 16=ounce, 16=pound, r4=stone, 2=quarter, 4=hundred, 20=ton.
The syrupus ferri phosphatis cum quinina et strychnina (Easton's Syrup) contains IIths of a grain of quinine in each drachm, that is, in each dose.
The dose of 2 to drachm contains little more than a grain of quinine, the antipyretic action of which is negligible.