ENLARGING FORMULASMATHEMATICSUse the fractional method as above.Example: Calculate the amounts of ingredientsfor a gallon of the following liquid:A review of basic mathematics will help youunderstand the important phases of phar-maceutical calculations.Glycerin . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 fl drDECIMALSLiq. phenol . . . . . . . . . . . . . . . . . . . . . . . . .1fldrWater q.s . . . . . . . . . . . . . . . . . . . . . . . . . . .4 fl drThere are 128 fl oz in a gallon. The fractionwould then become 128/4 or 32. Multiply eachingredient by 32.3 fl dr x 32= 96 fl dr or 12 fl oz of glycerin.1 fl dr x 32 = 32 fl dr or 4 fl oz of liq phenol.Then add sufficient quantity of water to make thetotal volume measure 128 fl oz (one gallon).REDUCING DOSESUse ratio and proportion.Example: We have 1/2 gr tablets on hand, andwe want to give the patient a 1/8 gr dose. Use 24minims of water as the solvent.1/2gr . . . . . . . . . . . . . . . ..24 minims of solvent1/8gr . . . . . . . . . . . . . . . .. X minims of solution1 / 2 : 1 / 8 : : 2 4 : X1 / 2 X = 3X = 6Give the patient 6 minims of the solution.ENLARGING DOSESUse ratio and proportion.Example: A tablet contains 1/2 gr ofphenobarbital, and we wish to give the patient 3/4gr.Dissolve 2 tablets in 4 ml of water:1 gr . . . . . . . . . . . . . . . . . . . . . .4 ml of solvent3/4 gr . . . . . . . . . . . . . . . . . . . . X ml of solutionGive the patient 3 ml of the solution.The decimal point represents a power of 10.Every time the decimal is moved one digit to theright, the number is multiplied by 10 and con-versely, every time it is moved one digit to the left,the number is divided by 10.Example:3.0—if we move the decimal one digit to theright: 30.0, we have multiplied the number3 x 10 = 30. If we move it another digit to theright, we have again multiplied by 10:30.0 x 10 ^{= }3 0 0 . 0 .3. 0—moving the decimal one digit to the left,we will have divided the number 3 by 10: 3 + 10= 0.3.If we move the decimal another digit to theleft, we will have divided by 10 again: 0.3 + 10= 0.03, and so forth.The number, or numbers, left of a decimalpoint are whole numbers or units; the numbersto the right of the decimal point are fractionalparts of the same unit. If you compare the decimalwith our monetary system, this is readilyunderstood.Example: 3.853 gram3.853 dollarsgrams = 8 decigrams dollars = 8 dimes5 centigrams5 centsAddition of DecimalsWhen adding, keep the decimal points in a ver-tical line to avoid confusing fractional numberswith whole numbers.Examples:1.30.5011.2.015.0651.43523.015456.6513.015481.1658-5

Integrated Publishing, Inc.

6230 Stone Rd, Unit QPort Richey, FL34668

Phone For Parts Inquiries: (727) 493-0744
Google +