Beers Criteria- Geriatric Meds Flashcards
(37 cards)
ACE-I and K
hyperkalemia
BB and AChE-I
Bradycardia
CCB/nitrate/alpha-blocker
hypotension
Diuretic and Diuretic
e-ltyle disturbance, dehydration, hypotenision
Benzo, sedative hypnotic, GI antispasmodics, muscle relaxants, 1st generation antihistamines
sedation, confusion, falls, cognitive impairment
Pharmacodynamics
“what drug does to the body”
benzo, opioids, warfarin, dig ,anticholinergic’s
- increases SENSITIVITY in changes in receptor/affinity- pharmacodynamic
BB and B- agonists
DECREASE sensitivity in changes in receptor/affinity- pharmacodynamic
Change in homeostatic Response
orthostatic BP- decreases barorectpor response
NA and water conserve
mobility and balance issues
Pharmacokinetics -Lipid Soluble drugs i.e. Diazepam
highly bound drugs i.e. phenytoin
stay in the body longer because there is increased body fat and decreased serum albumin
pharmacokinetics-
what body does to the drug
ADME
creatine clearance
volume of the body fluid from which the drug is removed per unit time
- lower muscle mass- low serum crt - Scr level round to 1.0 (not overestimatE)
GI
increase stomach pH, decrease GI blood flow, slowed gastric emptying, GI tranist
decrease drug absorption, decrease first pass metabolism, rate of absorption prolonged
i.e. ulceration with ASA, NSAIDS, iron/b12/ca with achlorhydria
Body Composition
decreased TBW, lean body mass, serum albumin, increase body fat
increases lipid soluble drugs and decrease water soluble
i.e. benzo like diazepam (lipid soluble high half life)
i.e. phenytoin (highly aluminum bound)
Liver
decreased liver mass, liver flow, CYP enzymes
first pass effect increase high t1/2
i.e. morhpine, propranolol- first pass
Renal
decreased GRF, tubular secretion, renal blood flow, renal mass
- renal emlimination of meds decreases, t 1/2 increases
i. e. numerous drugs
Strategies to increase adherence to meds
simplify dosing regimens use pill box have family/friends help explain benefits to adherence discuss SE in context of med benefits use monitoring to motivate and educate write clear written instructions have pt carry list of medications put indication on RX and label
Types of Non-adherence to meds
intentional (se, lack of benefit)
unintentions (forgot, financial issues)
bio-availability
fx of drug dose reaching systemic circulation
metabolism
conversion of drug to pharmacological active or inactive compound.
body compositiion in agigin
lean body mass, decrease serum albumin, increase body fat leads to
lipid soluble meds- long t1/2-benozo
or highly albumin bound drugs i.e. phenytoin (increase free fx)
highly albumin bound drugs
phenytoin- increase free fx
cr CL in elderly
lower muscle mass, lower serum level = Scr 1.0
polypharmacy
> 6 meds- more medications than clinically necessary- increase risk of cognitive impairment, falls, functional status, costs