Psychological Flashcards
What is acute pain?
sudden onset, usually subsides when treated. 6 weeks or less
what is chronic pain?
persistent/recurring, more difficult to treat. 3-6 months, OR longer than 1 months after healing from an acute injury
what are analgesics?
medications that relieve pain without causing a loss of consciousness
what is tolerance?
effectiveness of a drug is significantly reduced after prolonged use
what is withdrawal?
unpleasant physical/mental symptoms when a drug is suddenly stopped or decreased in dosage
what is physical dependence?
a need to continue taking a drug to avoid unwanted side effects
what is addiction?
chronic neurobiological disease in which genetic, psychosocial, environmental factors induce changes in behavior to compulsively use drugs
what are opioid analgesics?
synthetic drugs that bind to the opiate receptors in the brain and relieve pain. Strong, can alleviate pain of any origin, known to cause tolerance and dependence
what are nonopioid analgesics?
do NOT work on opiate receptors. Examples are NSAIDs. This is a large, chemically diverse group of drugs that also have anti-inflammatory and antipyretic activity.
what is neuropathic pain?
pain resulting from a damaged nervous system or damaged nerve cells. Does not usually respond to NSAIDs or opioids. Extremely difficult to treat
what drug classes can help with neuropathic pain?
antiseizure, antidepressants
what is fibromyalgia?
one of the most common neuropathic conditions. Widespread musculoskeletal pain accompanied by fatigue as well as sleep, memory, and mood issues. Amplifies painful sensations by affecting the way your brain processes pain signals
what are the 3 classes of opioid drugs?
morphine-like
meperidine-like
methadone-like
how do opioids work?
bind to opioid receptor in the brain, causing an analgesic response. Most are known as opioid agonists
what are 3 types of opioid receptors?
mu, kappa, delta
what are 4 adverse events of opioid use?
potential for abuse
histamine release
CNS depression => respiratory depression
GI tract - nausea/vomiting, constipation
what class of opioid causes the most histamine release?
morphine-like
what class of opioid causes the least histamine release?
meperidine-like
what are 2 opioid antagonists?
naloxone
naltrexone
what is the main drug interaction concern for opioids?
added respiratory depression with other CNS depressants like barbiturates, benzodiazepines, alcohol
what schedule are most opioids, and what is the exception?
II
Codeine is III if combined with other drugs
what class are morphine-like drugs?
phenanthrenes
what class are meperidine-like drugs?
phenylpiperidines
what class are methadone-like drugs?
phenylheptanes
Name 3 morphine-like (phenanthrene) drugs
Morphine
Hydromorphone
Oxymorphone
Codeine
Hydrocodone
Oxycodone
Name 2 meperidine-like (phenylpiperidine) drugs
meperidine
fentanyl
Name one methadone-like (phenylheptane) drug
methadone
what 3 drugs are stronger than morphine?
hydromorphone
oxymorphone
fentanyl
what 3 drugs are the same strength as morphine?
oxycodone
meperidine
methadone
what 2 drugs are weaker than morphine?
codeine
hydrocodone
what is inflammation?
localized protective response stimulated by injury to tissues that destroy, dilute, or wall off both the injurious agent and the injured tissue. Due to increased blood flow
what chemical is released from phospholipids in the first response of inflammation?
arachidonic acid
what are the 2 routes for arachidonic acid to be metabolized?
prostaglandin pathway
leukotriene pathway
what chemical is involved in the prostaglandin pathway and what does it do?
cyclooxygenase (COX) converts arachidonic acid into prostaglandins that cause vasodilation and vasopermeability, increasing action of histamine and bradykinin
what chemical is involved in the leukotriene pathway and what does it do?
lipoxygenase converts arachidonic acid into leukotrienes and increases the inflammatory response
what is the method of action of NSAIDs?
they inhibit the prostaglandin or leukotriene pathway, or both
what does COX-1 do and what’s wrong with inhibiting this too much?
many effects including maintaining intact GI tract. Inhibiting this makes NSAIDs ulcerogenic and risky for bleeds.
what does COX-2 do?
more of a primary role in converting inflammatory prostaglandins
what are adverse effects of NSAIDs?
GI tract - heartburn to GI bleeds
Acute renal failure
Increased heart attack or stroke risk - especially COX-2
what happens when you mix NSAIDs with anticoagulants?
increased bleeding risk
what happens when you mix NSAIDs with aspirin/salicylate?
increased GI toxicity
what happens when you mix NSAIDs with corticosteroids?
increased risk of ulcers
what happens when you mix NSAIDs with ACE inhibitors?
reduced antihypertensive effects due to inhibited renal prostaglandins synthesis
which NSAID is offered as a topical gel?
diclofenac sodium
which NSAID is used for gout?
indomethacin
which NSAID is used for kidney failure?
ketorolac
what is the name of a COX-2 inhibitor?
celecoxib
what are the names of 2 propionic acid derivatives?
ibuprofen
naproxen
what are the 5 classes of NSAIDs?
salicylate
acetic acid derivative
cyclooxygenase-2 inhibitor
enolic acid derivative
propionic acid derivative
what happens when you mix NSAIDs with diuretics?
reduced diuretic effects due to inhibited renal prostaglandins synthesis
what 2 antiseizure medications can be used for neuropathic pain?
gabapentin
pregabalin
how does gabapentin work for neuropathic pain?
not well understood. Chemically related to GABA, a neurotransmitter that inhibits brain activity. It’s thought to build up GABA
how does pregabalin work?
not well understood. Chemically related to gabapentin but binds to alpha2-delta receptor sites instead of GABA. This affects calcium channels in CNS tissue
what are adverse events of gabapentin and pregabalin?
dizziness
drowsiness
nausea
edema
what is a third drug that can be used for neuropathic pain and what class is it?
milnacipran, SNRI
what disease is milnacipran indicated for?
fibromyalgia
what happens when milnacipran is mixed with digoxin?
adverse hemodynamic events like postural hypotension and tachycardia
what happens when milnacipran is mixed with clonidine?
inhibited antihypertensive effect due to blocking of norepinephrine uptake
what are adverse events of milnacipran?
Nausea
Headache
Constipation
Dizziness
Insomnia
Hot flush
Excessive sweating
Vomiting
Palpitations
Increased HR
Dry mouth
Hypertension