analgesics Flashcards
chronic pain
lasting 3-6 months
somatic
musculo-skeletal
visceral
organs, smooth muscle
superficial
skin/ mucous membrane
referred
away from the organ of origin, follows nerve pathways
neuropathic
pathological nerve change
- nerves affected
phantom
amputation
confused nerve endings
threshold
physiological response
level of stimulus needed to produce pain usually the same for all people
tolerance
amount of pain a person can handle without interfering with normal function
what does tissue injury cause the release of
Prostaglandins*
Bradykinin
Histamine
Potassium
Serotonin
analgesics MOA
bind to opioid receptors endorphins and enkephalins
primary opioid receptors
Mu
Kappa
Delta
indications
alleviate moderate to severe pain
adjuvant therapy
medicines given after the main treatment
- NSAIDS
- antideps
- antoconvs
- corticosteroids
most serious SE of opioids
respiratory depression
interactions with analgesics
alcohol
CNS depressants
- barbiturates
- benzodiazepines
- phenothiazines
use analgesics with extreme caution in
repspiratory insufficiency
elevated ICP
morbid obesity
sleep apnea
paralytic ileus
use morphine with extreme caution in …
head injury
gallstones
what is 5x more potent than morphine
hydromorphone
oxycodone CR
give alone or with acet.
lasts 12 hrs
not PRN
great risk of resp. depression
severe chronic pain
meperidine
meperidine-like drug
caution in geriatrics
may cause seizures
tz not to exceed 48 hours
dose less than 600 mg in 24 hours
fentanyl (duragesic)
- patches
- often for cancer induced pain
- chronic pain
- IV form commonly given
methadone like drugs
methadone (dolophine)
buprenophine
naloxone (suboxone)
detox for addicts
tramadol (utram)
Centrally acting synthetic opioid
Weak bond with mu receptor
Still check respiratory rate
(basically a lower level narcotic)
tolerance
a common physiologic result of chronic opioid treatment
dependence
physiologic adaptation of the body to the presence of an opioid
not addiction
psychological dependence
drug addiction
pattern of compulsive drug use charectarized by a continued craving for an opioid and the need to use the opioid for effects other than pain relief
clinical opioid withdrawal scale
(COWS)
- anxiety, irritability, confusion
- lacrimation, rhinorrhea
- chills, diaphoresis, hot flashes
- N/V/D, GI cramping
- joint pain