Pharmacology Flashcards
(274 cards)
What does ADME stand for?
Absorption
Distribution
Metabolism
Excretion of drugs
What is pharmacokinetics
the study of ‘ADME’ the absorption, distribution, metabolism and excretion of drugs.
What phase is bypassed when a drug is administered intravenously
absorption
What is absorption
the transfer of a drug from the site of administration to the blood stream
What is the most important site for drug absorption for orally administered drugs?
the small intestine
what mechanical factor can increase absorption
massaging the injection site
what is distribution
the pattern of distribution of drug molecules by various tissues ~after the chemical enters the circulatory system~
After being absorbed, where is the drug distributed?
to the organ with the highest blood flow
- orally to the liver
- sublingually to the heart
What is an important protein that may alter the effects of drug distribution
albumin; a plasma protein that binds to a large range of drugs, this interaction may interfere with active drug concentrations in the blood; if it is albumin binding drug, you may have to increase drug dosage
What is Metabolism
the process by which the body breaks down and converts medication into active chemicaal substances
What is a major site for drug metabolism
THE LIVER
If a person has liver disease or past/present substance abuse, what effect may occur when metabolizing medications
May have a compromised ability to metabolize medications
What is elimination
the elimination or excretion of a drug is understood to be any one of a number of processes by which a drug is eliminated from the body
What is the most important route for drug elimination
renal (kidney) excretion
What drugs are NOT excreted in the urine
lipid soluble drugs (need to be metabolized into water soluble form by liver)
What is the only way to terminate a drug’s effect
Drug elimination
What is the major route of fluoride elimination
excretion in the urine
**What are ~the main~ factors that alter drug efficacy (8 points)
- patient compliance
- liver dysfunction
- disease
- past or present abuse
- drug metabolism
- kidney disease
- route of administration
- weight
What doe the ‘surface area’ or ‘clark’s rule’ take into account when determining child’s dosage
more accurate than ‘cowling’s rule’ or ‘young’s rule’ (take into account age) because it calculates in weight
What is a toxic reaction
the amount of desired effect is excessive; dose related
What is a side effect
dose-related reaction that is not part of the desired therapeutic outcome
ex: drowsiness that occurs with antihistamine use
What is an idiosyncratic reaction
abnormal drug response that is usually genetically related
What is a local effect
local tissue irritation
What is a teratogenic effect
relationship between maternal drug use and congenital abnormalities
ex: thalidomide induction of phocomelia (shortened limbs)