Pharm quiz 1 - 2 Flashcards
acute pain is how long?
up to 6 months
Nociceptive pain is caused by
stimulation of peripheral nerve fibers that respond only to
stimuli approaching or exceeding harmful
intensity (nociceptors) and may be classified
according to the mode of noxious stimulation; (chili peppers, etc)
neuropathic pain results from
any nerve that is NOT functioning. lesions or diseases affecting the somatosensory system or a nerve
๏จ Common Causes of Neuropathic Pain
๐ HIV
๐ Diabetes
๐ Alcoholism
๐ Chemotherapy
๐ Multiple Sclerosis
๐ Shingles
๐ Amputation
visceral pain, Like somatic pain, nociceptors
send signals to the spinal cord and brain when damage is detected. Unlike somatic pain, however, visceral pain is harder to pinpoint
Sometimes described as
generalized aching or squeezing. It is caused by compression in & around the organs, or by stretching of the
abdominal cavity
visceral pain examples
๐ Endometriosis
๐ Irritable bowel syndrome
๐ Bladder pain (cystitis)
๐ Prostate pain
๐ Fibroids
pain assessment (ABCDE)
๏จ Ask about pain- โWhat bought you to the Hospital?โ
๏จ Believe the patient and family
๏จ Choose appropriate options for management
๏จ Deliver timely and coordinated interventions
๏จ Empower patients to control options
who pain scale
๏จ Pain Description
๏ง โMild painโ - 1 to 3
๏ง โModerate painโ - 4 to 6
๏ง โSevere painโ 7 to 10
๏จ Opioid
- Inclusive termโ means โopiate likeโ, includes endogenous opioid-peptides, synthetic or semi-synthetic which have actions similar to those of morphine
morphine
Action
๐ OpioidAgonist Analgesic
๐ Mimics endogenous opioid peptides producing analgesia, euphoria& sedation
๐ Binds to the same receptor sites as opioid peptides (natural enkephalins & endorphins)
๐ Modulates pain perception in the brain and spinal cord
๏จ Use
๐ Analgesia, pain relief
๐ Anxiety reduction
๐ Sedation, drowsiness
๐ Sense of well being (*unlabeled use: MI pain relief)
**(Morphine Sulfate Extended release)
morphine precautions and adverse effects
๐ Respiratory suppression ***** ABC
๏ฎ Monitor in COPD, Asthma, obesity and sleep apnea
๐ Pregnancy or labor
๏ฎ Decreased uterine contraction, fetal depression
๐ Head Injury
๏ฎ Elevates ICP (intercranial)
๏จ Adverse Effects
๐ Opioid induced constipation (OIC)
๐ Orthostatic hypotension
๐ Urinary retention
๐ Cough suppression (post-oppneumonia risk)
morphine nursing considerations
๐ In pill / capsule form (ER/SR) do not crush, chew
before administering
๐ Make sure that a patient is observed for at least 24
hours in fully equipped and staffed environment
if morphine is given by epidural or intrathecal
route
๐ IV Push:Have pt lie down, dilute & push slowly to
minimize effects
๐ Reassure ptโs that they are unlikely to become addicted
when using opiates for medical purposes
morphine precautions and interactions
๐ Biliary Colic ? (spasms of the common bile duct)
๐ Nausea and Vomiting
๐ Miosisโpupil excessive constriction
๐ Neurotoxicity (agitation, delirium, hallucinations, increased pain)
๏จ Drug Interactions
๐ CNS depressants will intensify adverse effects
๏ฎ Alcohol, barbiturates, benzodiazepines
๐ Antihypertensives exaggerate orthostatic hypotension
๐ MAOIโs (tx Depression) may cause seizures and death
๏จ Antidote โ naloxone โ (Narcanยฎ)
Meperidine (Demerolยฎ) - think Sz
Meperidine (Demerolยฎ) - think Sz
๏จ Actions
๐ Opioid Analgesic
๐ May provide local anesthetic effects
๏จ Use
๐ Drug induced rigors
๐ Post anesthesia shivering
๐ Alternative to other opioid
demerol precautions and adverse effects
Precautions
๐ Vistaril (antihistamine) combowill intensify effect of Demerolยฎ
๐ Short ยฝ life
๐ Normeperidine metabolite is toxic
๐ NTE> 600mg / 24 hours for over 2 days
๏จ Adverse Effects
๐ Toxic seizures
๐ Blockade of Serotonin reuptake (mood hormone neurotransmitter)
demerol interactions and nursing considerations
Drug Interactions
๐ Others: MAOI combo can cause excessive activationof
serotonin receptors causing excitation, delirium,
hyperthermia, seizures, coma & death
๏จ Nursing Considerations
๐ Less respiratory depression, constipation and vomiting
as compared to morphine
๏จ Pregnancy Category B
difference btwen merperidine and morphinea
Meperidine is less apt to release histamine or to
increase biliary tract pressure
๏จ Meperidine has a shorter duration of action
๏จ Meperidine has poor oral bioavailability
๏จ Meperidine is metabolized in the liver to
normeperidine, a CNS neurotoxin, that is especially
dangerous to children and older adults
naloxone precautions and adverse effects
Precautions!
๐ Give IV, IM, Sub-Q (PO has rapid first pass effect)
However, PO form is used in addiction
treatment at 50 mg/day
๐ Administered in the absence of opioids has no effect
๐ Given prior to opioids will block opioid action
๐ Administered during opioid use will reverse effects
๐ Given to physically dependent opioid patients will cause an immediate acute withdrawal effect
๏จ Adverse Effects
๐ Pain, loss of analgesia
๐ Increased respiratory rate
๐ Restlessness, anxiety
naloxone drug interactions and nursing considerations
Drug Interactions
โฆ Cannabinoids:may cause enhancedcannabinoid effect(mechanism
unknown)
โฆ All opiate comboโs(Vicodinยฎ, Percocetยฎ, etc.)
โฆ Yohimbe:May result inadditive therapeutic or adverse effects (additive
effect)
โฆ Nursing Considerations
โฆ Monitor the patient continuously after useof naloxone, repeat dosesmaybe
needed
โฆ Maintainan open airway and be prepared to provide artificial ventilation
and cardiac supportif needed to counteractthe opioid overdose
๏จ Pregnancy Category: C
vicodin actions and use
Actions
๐ Opioid combo
๏จ Use
๐ Produces analgesia and antipyretic effects, hydrocodone binds to various opioid receptors producing analgesia and sedation
vicodin precautions and adverse effects
Precautions
๐ Cr at baseline for renal disease,
adjust as needed (Bun 7-20, Cr 0.84-1.21)
๐ LFTโs if severe hepatic disease(ALT 7-55u/L, AST 8-33u/L)
๏จ Adverse Effects
๐ Respiratory depression
๐ Hepatotoxicity
๐ Dependency, Abuse
vicodin drug interactions and nursing considerations
๐ Inhibitors: Amiodarone (cardiovascular drug)
๐ Inducers: barbiturates, tegretol
๏จ Nursing Considerations
๐ Avoid abrupt cessation to prevent withdrawal sx
๐ Name confusion: Hycodanยฎ, Percodanยฎ,
Hydro/ codone combos etc.
๏จ Pregnancy Category: C
methadone actions and use
Actions
๐ Opioid Analgesic
๐ Action similar to morphine
๏จ Use
๐ Relieve severe or chronic pain
๐ Methadone Maintenance
๏ฎ Treat opioid addicts, substitute methadone for the opioid
๏ฎ Withdrawal is accomplished by administering methadone
gradually in smaller doses
methadone use and precautions
๐ Methadone suppression: Prevents opioid induced
euphoria, by giving addicts larger doses of methadone
(>100 mg/day) pt will develop tolerance to other
opioids. Taking street drugs will not produce same
euphoric effects.
๏จ Precautions
๐ Severe dysrhythmias, prolongs the QT interval, V-fib
๐ Respiratory suppression