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Chemistry Internship Study Questions Section 2
Therapeutic Drug Monitoring (TDM) & Toxicology
38
Chemistry
Undergraduate 4
10/23/2015

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Term
In general, when should peak TDM levels be drawn?
Definition
1 Hour after dose
Term
In general, when should trough TDM levels be drawn?
Definition
Just before the next dose
Term
When should digoxin peak levels be drawn and why?
Definition
8 hours after dose;
It takes that long for serum/tissue to reach equilibrium
Term
Define half life
Definition
Time it takes for the concentration of a drug to decrease by 1/2
Term
What is meant by "steady state" drug?
Definition
Amount drug excreted = Amount of drug absorbed
Term
How many drug doses are required to reach steady state?
Definition
5-7 doses
Term
List 3 factors that may affect drug metabolism
Definition
Age, Renal Function, Heart, GI or Liver Disease, Genetic Factors
Term
Why are the first-pass metabolite(s) of some drugs as well as the parent drug BOTH measured?
Definition
Both forms are physiologically active
Term
Can you list 2 drugs that fit into the first-pass category?
Definition
Primadone & phenobarbital;
Procainamide & NAPA
Term
Why is protein quantitation necessary in some patients receiving therapeutic drugs?
Definition
Protein levels affect the amount of bound and free drug. The free form is physiologically active. Decreased Protein levels will result in more free drug.
Term
Why must SST (serum separator tubes) be avoided when testing for some therapeutic drugs?
Definition
SS may absorb some drugs causing Falsely Decreased levels.
Term
List the common use for the following:

Lithium
Definition
Bi-Polar Disorder
Term
List the common use for the following:

Methotrexate
Definition
Cancer
Term
List the common use for the following:

Primadone
Definition
Seizures
Term
List the common use for the following:

Valproic Acid
Definition
Anti-convulsant
Term
List some of the more commonly used cardioactive drugs
Definition
Digoxin, quinidine, procainamide
Term
What is the general function of aminoglycosides, vancomycin, and chloramphenicol?
Definition
Antibiotics
Term
What are some of the serious toxic effects of aminoglycosides, vancomycin, and chloramphenicol?
Definition
Ototoxicity & Renal Damage
Term
What is the common brand name for phenytoin?
Definition
Dilantin
Term
What is Phenytoin/Dilantin used for?
Definition
Control Seizures and Epilepsy
Term
In what general group of drugs are Demerol & Codeine?
Definition
Opiates
Term
In what general group of drugs are Librium & Valium?
Definition
Psychotropic
Term
List 2 commonly used immunosuppressive drugs that are used on organ transplant patients to suppress host vs graft disease.
Definition
Cyclosporin & Tacrolimus (FK 506)
Term
Why should thalidomide NOT be given to younger women?
Definition
Devastating Birth Defects
Term
What organ is most susceptible to the toxic effects of the following:

Acetaminophen
Definition
Liver
Term
What organ is most susceptible to the toxic effects of the following:

Salicylate
Definition
CNS
Term
What organ is most susceptible to the toxic effects of the following:

Ibuprofen
Definition
Kidneys
Term
What is the LEGAL limit for Blood Alcohol in Arkansas?
Definition
0.08% / 80 mg/dL
Term
What is the CRITICAL Value for Blood Alcohol?
Definition
>350 mg/dL
Term
What precaution should be made when drawing blood for an alcohol level?
Definition
AVOID Alcohol Swabs
Term
In what type of tube should a Blood Alcohol be collected?
Definition
Light Green
- May vary though
Term
What should a Chain of Custody be initiated in regards to drug or alcohol analysis?
Definition
If there could be ANY Legal Ramifications such as law suits or worker's compensation.
Term
How would delta osmolality levels be affected in cases of alcohol toxicity?
Definition
>10
Term
What urinalysis finding is associated with ethylene glycol poisoning?
Definition
Calcium Oxalate Crystals
Term
What are the most common testing methods used to screen for drugs of abuse?
Definition
FPIA, EMIT, TLC
Term
What is considered to be the "gold standard" technique for drug confirmation?
Definition
Gas Chromatography Mass Spectrometry (GC Mass Spec)
Term
What is the formula for Delta Osmolality?
Definition
Measured - Calculated
Term
What is the formula for Osmolality?
Definition
2(Na) + (GLU/20) + (BUN/3)
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