Chapter 15 Flashcards
Define the term pharmacology
study of drugs
define the term drug
Any substance that can produce biological changes in the body, whether those changes are therapeutic or damaging.
if therapeutic it can be terms medication.
they can be very addicitive and cause abuse potential.
Who can prescribe a prescription (Rx) drug?
licensed physician dentist- limited to which kinds optometrist- eye medication physician assistants- limited nurse practitioners- limited psychiatrist- limited
What are OTC drugs?
over the counter or medications that do note require a Px.
- self-precribed
Who determined if a drug must be prescribed by a doctor or can be purchased as an OTC drug?
FDA
what are supplements?
products that are not sold as therapeutic drugs
-FDA does not regulate diatary supplements and medicinal herbs
Define the US drug schedule chart- used to categorize dependency
schedule 1- highest potential for abuse - eg LSD/heroin
schedule 2- high potential for abuse- morphine,
schedule 3- moderate potential for abuse- codeine, T3
schedule 4- lower potential for abuse- Valium, Xanax
Schedule 5- lowest potential for abuse- OTC cough medicine with codeine
Drugs have 3 categories of names. What are they using an example.
chemical, generic and trade name: ie:
chemical name: N-Acetyl-para-aminophenol
generic: acetaminiphone-
trade name: Tylenol
What are the two terms given to describe the two processes in which how a drug is utalized in the body?
- pharmacokinetics- how drug moves in the body (metabolized, transported, excreted)
- pharmacodynamics- how drug changes the body.
how are administration routes, dosages nd dosing schedules determined?
by how the drug moves thorugh the body and the target location effectiveness.
what can affect a drug response in the body?
tolerance, placebo effect, and other body variables as well as dosage and potency.
drug metabolism varies in individuals. Define some variant facotrs
age, gender, DMI, and genetic makeup.
what factors must you consider when determine an administration method of a drug?
speed and degree of absorption- to determine time and onset + intensity
Define the term side effect
a nearly unavoidable secondary drug effect produced at therapeutic doses.
what is drug toxicity?
excessive dosing that causes adverse effects
define the following terms:
- allergic reaction
- idiosyncratic effects
- iatrogenic
- physical dependence
- carcinogenic effect
- teratogenic effect
- immune responses
- uncommon responses to a drug secondary to a genetic predisposition.
- medication error
- occurs when body adapts to repeated use of a substance and thus becomes addicted to the drug
- cancer-causing
- drug-induced birth defects.
When drugs react with eachother there are 3 outcomes. What are they?
- effect is intensified-
- reduced effect- this is why it is important for some drugs to be taken with food, and others on empty stomach
- new effect- ie. MAO inhibitors and food rich in tyramine can raise BP to critical
The heart is assisted by pressure gradients in the vascular system, which are dependant on what factors?
diameter and length of blood vessels
and resistance to blood flow.
it is regulated by a feedback system that involves the (autonomic neuvous system) ANS and teh RAS (renin-angitensin system) and kidneys
What does the ANS, RAS and kidneys do on the circulatory system?
ANS - controls heart
RNS- controls constriction of arterioles and veins. \
kidney: regulate blood volume
What does angiotensin 2- do on the body
its the chemical that causes the muscles surrounding the blood vessels to contract, which increases BP.
if this were to be blocked, it would help regulate BP and also blood volume
Define Angiotensin-converting enzyme inhibitor
called ACE inhibitor.
inhibits the RAS from producing angiotensin 2. > controls BP
AE: chronic cough,
eg: lisinopril and enalapril
Define Angitensin receptor blockers
called ARBs
-block angiotensin 2 from binding to the angiotensin receptors
AE: none, its used if ACE inhibitors has AE
EG: losatan nd candesartan
What do beta blockers do?
decrease heart rate and contractile force, which decreses the cardiac O2 demand. this reduced BP and promotes dilation of blood vessels.
When are Beta blockers usually pxed?
in angina pectoris, heart failure HTN helpful in some dysrhythmias, migraines, glaucoma, benign tremor, nd anxiety
it acts as a cardioprotective agent following MI or intervention for CAD.
EG: antenolol, metoprolol.