The Medical Algorithms Project       
 
Chapter : ch40. Unit Conversions Section : Unit Conversions

  Conversion of SI to Conventional Units: Therapeutic Drug Monitoring

  Excel Sheet Reference
Copyright (c) 2006-2007, Institute for Algorithmic Medicine, Houston, TX, USA. All rights reserved.
     

Overview :

Measurement of drug levels performed on serum or plasma can be converted between conventional (US) and SI units if the conversion factors are known.

Specimens: plasma or serum

Generic Drug

Trade Name

SIU Units

Factor for Conversion

Conventional Units

acetaminophen

Tylenol

µmol/L

0.151

µg/mL

amikacin

µmol/L

0.585

µg/mL

amitriptyline

nmol/L

0.277

ng/mL

amobarbital

µmol/L

0.226

µg/mL

amphetamine

µmol/L

0.135

µg/mL

bromide

mmol/L

79.9

µg/mL

caffeine

µmol/L

0.194

µg/mL

carbamazepine

Tegretol

µmol/L

0.236

µg/mL

carbenicillin

µmol/L

0.378

µg/mL

chloral hydrate

µmol/L

0.149

µg/mL

chloramphenicol

µmol/L

0.323

µg/mL

chlordiazepoxide

Librium

µmol/L

300

ng/ml

chlorpromazine

Thorazine

nmol/L

0.319

ng/mL

chlorpropamide

Diabinese

µmol/L

0.277

µg/mL

cimetidine

Tagamet

µmol/L

0.252

µg/mL

clonazepam

Clonopin

nmol/L

0.316

ng/mL

clonidine

Catapres

nmol/L

0.23

ng/mL

cocaine

nmol/L

0.303

ng/mL

codeine

nmol/L

0.299

ng/mL

desipramine

Norpramin

nmol/L

0.267

ng/mL

diazepam

Valium

nmol/L

285

ng/mL

digitoxin

nmol/L

0.765

ng/mL

digoxin

nmol/L

0.781

ng/mL

disulfiram

µmol/L

0.297

µg/mL

doxepin

Sinequan

nmol/L

0.279

ng/mL

ethanol

mmol/L

4.61

mg/dL

ethchlorvynol

Placidyl

µmol/L

0.145

µg/mL

ethosuximide

Zarontin

µmol/L

0.141

µg/mL

gentamicin

µmol/L

0.478

µg/mL

glutethimide

Doriden

µmol/L

0.217

µg/mL

haloperidol

Haldol

nmol/L

0.376

ng/mL

hydromorphone

Dilaudid

nmol/L

0.206

ng/mL

ibuprofen

µmol/L

0.206

µg/mL

imipramine

Tofranil

nmol/L

0.28

ng/mL

isoniazid

µmol/L

0.137

µg/mL

kanamycin

Kantrex

µmol/L

0.485

µg/mL

lidocaine

Xylocaine

µmol/L

0.234

µg/mL

lithium

mmol/L

1

mEq/L

lorazepam

nmol/L

0.321

ng/mL

LSD

µmol/L

0.323

µg/mL

meperidine

Demerol

nmol/L

0.247

ng/mL

meprobamate

µmol/L

0.218

mg/L

methadone

µmol/L

309

ng/mL

methaqualone

Quaalude

µmol/L

0.25

µg/mL

methotrexate

nmol/L

0.454

ng/mL

methsuximide

µmol/L

0.189

µg/mL

methyldopa

Aldomet

µmol/L

0.211

µg/mL

morphine

µmol/L

285

ng/mL

nortriptyline

nmol/L

0.263

ng/mL

oxazepam

µmol/L

0.287

µg/mL

oxycodone

Percodan

nmol/L

0.315

ng/mL

paraldehyde

µmol/L

0.132

µg/mL

pentobarbital

Nembutal

µmol/L

0.2262

µg/mL

phenacetin

µmol/L

0.179

µg/mL

phenobarbital

Luminal

µmol/L

0.232

µg/mL

phenylbutazone

Butazolidin

µmol/L

0.324

µg/mL

phenytoin

Dilantin

µmol/L

0.253

µg/mL

primidone

µmol/L

0.218

µg/mL

procainamide

Pronestyl

µmol/L

0.236

µg/mL

procaine

Novocaine

µmol/L

0.236

µg/mL

propoxyphene

Darvon

µmol/L

0.326

µg/mL

propranolol

nmol/L

0.259

ng/mL

quinidine

µmol/L

0.324

µg/mL

quinine

µmol/L

0.324

µg/mL

salicylic acid

µmol/L

0.138

µg/mL

secobarbital

Seconal

µmol/L

0.238

µg/mL

theophylline

µmol/L

0.18

µg/mL

tobramycin

µmol/L

0.467

µg/mL

valproic acid

µmol/L

0.144

µg/mL

vancomycin

mg/L

1

µg/mL

warfarin

Coumadin

µmol/L

0.308

µg/mL

  References:

American Society of Clinical Pathology. SI Conversion Guide. adapted from AJCP. 1987; 87:140-151.

Conversion Table for SI Units. Transfusion 1990; 30:79-90.

JAMA Instructions for Authors. 1997; 278: 74-76.

Jordan CD, Flood JG, et al. Normal reference laboratory values. NEJM. 1992; 327: 718-724.

Lehmann HP, Henry JB. Appendix 4: SI Units. pages 1449-1462. IN: Henry JB. Clinical Diagnosis and Management by Laboratory Methods, Nineteenth Edition. W.B. Saunders. 1996.

Lundberg GD. SI Unit Implementation - the next step. JAMA. 1988; 260: 73-74.

McQueen MJ. SI Unit Pocket Guide. ASCP Press. Chicago. 1990.

Tietz NW (editor). Clinical Guide to Laboratory Tests, Third Edition. W.B. Saunders Co. 1995.

Wallach J. Interpretation of Laboratory Tests, 6th edition. Little, Brown and Company. 1996. pages 923-936.

Wallach J. Interpretation of Laboratory Tests, 7th edition. Lippincott Williams & Wilkins. 2000. page 978,

Wilson JD, Foster DW. Williams Textbook of Endocrinology, 8th Edition. W.B. Saunders Co. 1992. (front cover interleaf)

Young DS. Implementation of SI Units for Clinical Laboratory Data. Ann Intern Med. 1987; 106:114-129.

 

   Excel Sheet | Reference TOP
     Pubmed Search For
Copy and paste the article title, or authors names into the search box