Geri pharma Flashcards
def. adverse drug event
an injury resulting from admin of a drug
3 pharma factors influenced by ageing
- pharmcokinteitc - how body handles drugs
- pharmacodynamics - how drug affects body
- drug-drug interactions
4 parts of pharmacokinetics
- absorbtion
- dist.
- meatbolism
- elim
what influences a drug’s bioavailality
- drug liberation
- gastic motlity
- drug properties
- drug transporters
- drug metabolsim
2 gastic issues with age
- higher gastic pH
2. less motility - slower to act
how to change oral dosing with age
- no sig. need to change practices
what are 3 effects of aging skine
- sun exposure
- less blood supply
- less water contenet
3 ways vol. of dist changes with age and how it affects
- more fat
- longer half life of lipoohillic drugs - benzos - less water
- larger conc. of lipo phillic drugs - digoxins - less protein binding cap
2 phases of metabolism and how they change with age
- CYPs
- decreases by 30%
- CYPs
- conjugation
- no chnage
overall need to give a lower loading dose
2 general ways drugs are removed
- passive - renal
2. active - drug transporters
how does renal function change
- less nephrons
- less blood flow
- less GFR
- need to be cautious about renal drugs
3 renal drugs to be extra careful with
- lithium
- digoxin
- sulfonourea
ADME summary
A - less acid in stomach
D - langer half life and altered C
M - less liver metabolism
E - less kidney function
2 main dynamic changes with age
- drug-drug interaction
2. increased sens. to cog effects
3 more sens to and 2 less sens. to
more - sedatives - opiods - antichol less - BB - A stims
what is prob with benzos
CNS depression
- falls
- delirium
- less cog
use zoplicone
- no, just as bad - no safe sleeping pill
what is prescription cascade
giving drugs to Tx SE of previous drugs
4 methods to help prevent ADE
- computerized physician ordering
- multidisc. support
- patient educaiton
- assessment of meds apporpriatness
2 ways to assess appropriateness
- beers criteria
2. med appropriatness index
ris factors for not adhering
- polypharma
- cog issues
- funct. issues
- poor contact
- poor social supprt
- no assisstance with med. admin
3 ways to improve adherence
- med. dispensing aids
- meds review
- patient ed