Concentrations of Drug Products Concentrations are expressions of the strength of drugs in aqueous solutions or suspensions Concentrations of drugs in.

Slides:



Advertisements
Similar presentations
Calculating IV Drug Dose Infusing per hour or minute
Advertisements

Mathematical Aspects of Intravenous Therapy
Dilution, Concentration and Alligation
Drug Calculations CWFS F1 Programme Safe Prescribing Module
IV Drug Administration
Dilution and Concentration
1 Ratios and Proportions A ratio is a comparison of like quantities. A ratio can be expressed as a fraction or in ratio notation (using a colon). One common.
Drug dose calculation homework 1
WEIGHTS AND MEASURES Lecture – 13 03/ DR. SHAHNAZ USMAN
Reducing and enlarging formulas
Percentage and Ratio Strength Calculations
Intravenous infusions, Parenteral admixtures, and rate of flow calculations Dr. Osama A. A. Ahmed.
Dilution and Concentration
Dosage Calculation Review
Calculating Subcutaneous Heparin Dosages Use –Proportion method –Dimensional analysis –Formula method –As well as the ABC’s of dosage calculation Step.
Calculating Parenteral Dosages in Solution
© 2010 The McGraw-Hill Companies, Inc. All rights reserved 2-1 McGraw-Hill Math and Dosage Calculations for Health Care Third Edition Booth & Whaley Chapter.
Lab 4 Density, Specific gravity, Specific volume, and Expressions of concentration.
MEDICATION CALCULATION TEST REVIEW
ProCalc Nsg 231 Calculating IV Solution Concentration The concentration of a solution describes the mass of the solute (amount of drug) divided by the.
Drug Administration Formula methods in drug dose calculation ( for paramedics ) Dr. Maha Khalid Lecture 10.
7.1 Interpreting Labels Label InfoMeaning 25 mg/mlThis ratio tells the amount of medication in each ml of solution 1:4Ratios written this way always mean.
ProCalc Nsg 231 Calculating IV prescribed drug dose in ml/hr Example 1 An IV of dextrose 5% in water containing 2 mg of Isuprel (isoproterenol) and a.
ALLIGATION LAB 11.
Drug Calculations.
Calculating Drug Dosages
Copyright © 2010 Wolters Kluwer Health | Lippincott Williams & Wilkins Chapter 9: Special Types of Intravenous Calculations.
Chapter 9 Calculating Drug Dosages Copyright © 2013, 2010, 2006, 2003, 2000, 1995, 1991 by Mosby, an imprint of Elsevier Inc. 1.
Concentrations of Drug Products Concentrations are expressions of the strength of drugs in aqueous solutions or suspensions Concentrations of drugs in.
Intravenous Therapy IV Calculations (Math) Sasha A. Rarang, RN, MSN.
Math for the Pharmacy Technician: Concepts and Calculations Chapter 2: Working with Percents, Ratios, and Proportions McGraw-Hill ©2010 by the McGraw-Hill.
Quantity and Concentration Expression
Introduction to Pharmaceutical Calculation
Concentration Expression
Ratio Strength & Other Expressions of Concentration
Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins Chapter 7 Liquids for Injection.
Measurement in Veterinary Pharmacology
McGraw-Hill ©2010 by the McGraw-Hill Companies, Inc All Rights Reserved Math for the Pharmacy Technician: Concepts and Calculations Chapter 9: Special.
Copyright © 2015 Cengage Learning® Chapter 9 Parenteral Medication Labels and Dosage Calculation.
Danielle DelVillano, Pharm.D.
Percentage, Ratio Strength, and Other Expressions of Concentration
Yewande Dayo Student Pharmacist
Medical Dosage Calculation Copyright ©2012, ©2008 by Pearson Education, Inc. All rights reserved. Medical Dosage Calculations: A Dimensional Analysis Approach,
Danielle DelVillano, Pharm.D.
Danielle DelVillano, Pharm.D.
Dosage Calculation using Dimensional Analysis Part 1 NURS B 260.
 Tablets for suspension  Percentage preparations  Aliquots  Alligation  Solubility  Specific gravity  Capsule packing Will go over in PPC.
Practice Problems Biopharmaceutics-I.
Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Chapter 9 Parenteral Medication Labels and Dosage Calculation.
8.8 Concentration and Consumer Products. Recap: The amount concentration of a solution is the amount of solute per unit volume of solvent: c= n V where.
Elsevier items and derived items © 2009 by Saunders, an imprint of Elsevier Inc. Some material was previously published. Slide 0 Pharmacology: Principles.
The Alligation Method DeAna Smalls PBP Program August 4, 2016.
Rate Of Flow DeAna Smalls PBP Program August 3, 2016.
Percentage, Ratio Strength
Reconstitution of Solutions
Intravenous Therapy IV Calculation (Math)
Heparin, Insulin & other meds
19 Concentrations and Dilutions.
PHARMACY TECHNICIAN CHAPTER FIFTEEN.
A Brief Overview of Pharmacy Calculations for Pharmacy Technicians
Concentrations of Drug Products
Medical Dosage Calculations A Dimensional Analysis Approach
اشکال دارویی و محاسبات دوزاژ دارویی
Preparing and Diluting Solutions
Pharmaceutical Calculations (1)
University of Sulaimani Collage of Pharmacy 2nd Stage Pharmaceutical Orientation Some Calculations Involving ‘‘Units,’’ ‘‘µg/mg,’’ and Other Measures.
Percentage, Ratio Strength, and Other Expressions of Concentration
Reducing & Enlarging Formulas .
University of Sulaimani College of Pharmacy 2nd Stage Pharmaceutical Orientation Altering Product Strength, Use of Stock Solutions, and Problem- Solving.
Chapter 5 Calculations for Sterile Compounding.
Presentation transcript:

Concentrations of Drug Products Concentrations are expressions of the strength of drugs in aqueous solutions or suspensions Concentrations of drugs in solid dosage forms like creams or ointments Concentrations are ratios of amount of drug per volume Mg/ml, mcg/ml, mg/L, mg/dl and % w/v for solutions % w/w for solid dosage forms like creams And ppm for gases

Concentrations of Drug Products Concentrations are effectively the amount of drug in the total volume or amount of vehicle or product Courtesy of : Westward pharmaceuticals There is 100 mg of morphine in this whole vial of 10 ml of drug product Courtesy of : acetonide-29/page/2/ This product has 80 mg of drug in 80 g tube

Percentage Concentrations X % w/v is by definition X g of drug/100 ml solution 5% is 5 g/100 ml (very important is pharmacy) 0.9% is 0.9 g/100 ml (NS) X% v/v is by definition X ml of drug/100 ml solution X% w/w is by definition X g of drug/100 g of product

Dose Formula C * V= D C= concentration V= volume D= Dose To use this formula make sure all units match i.e. C= mg/ml V must be ml and D is mg

Sample Calculations A patient in the hospital develops an acute supraventricular tachycardia with a HR of 130 at rest. MD orders a STAT order of Diltiazem 10 mg IVP. If you have a vial of Diltiazem 50 mg/10 ml, how much do you draw into the syringe to deliver this dose? Courtesy of: gs/DILTIAZEM_HYDROCHLORIDE_INJECTION

Sample Calculations A patient in the hospital develops an acute supraventricular tachycardia with a HR of 130 at rest. MD orders a STAT order of Diltiazem 10 mg IVP. If you have a vial of Diltiazem 50 mg/10 ml, how much do you draw into the syringe to deliver this dose? Answer: C * V= D C is 50 mg/10 ml or 5 mg/ ml D is 10 mg 5 * V = 10 V= 2 ml Answer 2 you can use ratios and proportions 50 mg/ 10 ml = 10 mg/ X ml; and X=2 ml

Sample Calculations A patient is experiencing a DVT and requires a Heparin Drip with a loading dose of 8,000 units. You have a vial of heparin 1,000 units/ml, what volume do you use to deliver this loading dose? Answer C*V=D C= 1000 units/ml D=8,000 units 1000*V=8000 V= 8 ml

Sample Calculations A patient required a dose of insulin for hyperkalemia. The dose was supposed to be 10 units. 30 minutes later, patient develops profound hypoglycemia (30 mg/dl) and is comatose. Dextrose was given and patient recovers with no permanent brain damage. (Thank God). It was determined that the order was written as : regular Insulin.1 ml IVP stat. The pharmacist profiled the order as 1 ml IVP stat. If you have Humulin R (which is 1000 units/ 10 ml) and draw this volume what was the dose given? C*V=D C= 1000 unit/10 ml or 100 units/ml V= 1 ml 100 units/ml * 1 ml= 100 units What is the magnitude of the error? Dose given is 100 units Actual dose is 10 units 10 fold overdose How can such error be avoided? Write the order as : regular insulin 10 units IVP or 0.1 ml IVP

Sample Calculations A patient requires an amiodarone drip. The concentration of the drip is 450 mg/250 ml in D5W. You are asked to compound this drip. Using a 250 ml D5W and amiodarone 150 mg/ 3 ml vial how do you prepare this drip?

Sample Calculations If C= 150 mg/3 ml it is 50 mg/ml Dose is 450 mg (this is what must be added to the 250 ml bag) 50 * V = 450 V= 9 ml If each vial is 3 ml and you need 9 ml you need 3 vials 1 vial/ 3 ml = x vials/9 ml X= 3 vials This is an example of a dilution, which we will work on in class