Nonopioid and Opioid Analgesics Flashcards
Pain
Classified by origin
Somatic
Neuropathic pain
Nociceptors
Pain receptors (mechanical, thermal, chemical)
Somatic Pain
Structural pain from tissue injury
Neuropathic Pain
Sensory disturbance involving neural hypersensitivity
Burning, tingling, or electric shocks (diabetic neuropathy)
Anticonvulsants can help stabilize pathways and decrease pain
Natural Suppressors of Pain
Endorphins (these are opioids)
Cortisone
Under Treated Pain Sxs
Tachycardia, increased respiratory rate, increased stress response, urinary retention, fluid overload, electrolyte imbalance, hyperglycemia, infection
Nonopioid Analgesic Prototype
Acetaminophen (Tylenol, Robigesic)
Decreases pain and fever
Acetaminophen (Tylenol, Robigesic) Pregnancy Category
Pregnancy category B
Acetaminophen (Tylenol, Robigesic) Route
PO/PR (rectal)
There is also now an IV form but it is not used often
Acetaminophen (Tylenol, Robigesic) Sxs
Anorexia, N/V, rash
Acetaminophen (Tylenol, Robigesic) Adverse Reactions
Severe hypoglycemia, oliguria, urticarial
Acetaminophen (Tylenol, Robigesic) Life-threatening Reactions
HEPATOTOXICITY
Acetaminophen (Tylenol, Robigesic) Contraindications
Severe hepatic or renal dx, alcoholism, hypersensitivity
Acetaminophen (Tylenol, Robigesic) Drug Interactions
Increased effect with caffeine
Decreased effect with contraceptives, anticholinergics, cholestyramine, and charcoal
Nonopioid Analgesic (Acetaminophen) Nursing Considerations
Keep out of reach from children (high dose will cause hepatoxicity)
Do not take longer than 10 days, 5 days for children
Call poison control when child has taken large or unknown amount
Death from hepatoxicity within 1-4 days
Do not take more than 3,250 mg/day (adults)
Acetaminophen (Tylenol, Robigesic) Antidote
Acetylcysteine
Opioid Analgesic Prototype
Morphine Sulfate (MS Contin, Roxanol)
Depression of CNS and pain impulse
CCS II
Check I-STOP (all opioid medication info related to pt in EMAR, like a digital footprint for nurses as well)
High incidence of addiction
Do not use for more than 3 days
Morphine Sulfate (MS Contin, Roxanol) Pregnancy Category
Pregnancy category C/D
Morphine Sulfate (MS Contin, Roxanol) Routes and Onsets
IV onset rapid
IM peak 0.5-1 hour
PO peak 1-2 hours
Morphine Sulfate (MS Contin, Roxanol) Sxs
Dizziness, drowsiness, sedation, confusion, urinary retention, constipation, N/V
Basically a lot of CNS depressant sxs
Morphine Sulfate (MS Contin, Roxanol) Adverse Reactions
Hypotension, rash, seizures
Morphine Sulfate (MS Contin, Roxanol) Life-threatening Reactions
Respiratory depression and increased intracranial pressure
Morphine Sulfate (MS Contin, Roxanol) Drug Interactions
Increased effects with ETOH, sedatives, hypnotics, antipsychotics, anticonvulsants, and muscle relaxants
Basically other things that do CNS depression
Morphine Sulfate (MS Contin, Roxanol) Contraindications
Pts with asthma or respiratory depression, increased intracranial pressure, or shock (morphine will drop pt’s BP even more)
Caution: Respiratory, renal, or hepatic dx, MI (occasionally used in MIs), older adults, young children
Crosses placenta and is excreted in breast milk
Morphine Sulfate (MS Contin, Roxanol) Nursing Considerations
Administer before pain reaches its peak
Monitor VS, especially respiratory rate (less than 10 can indicate distress)
Monitor for hypotension
Measure urine output (urinary retention)
Monitor for constipation
Narcan is an antidote for overdose
Avoid ETOH and other CNS depressants
Morphine Sulfate (MS Contin, Roxanol) Antidote
Narcan
2nd Opioid
Meperidine (Demerol)
Pain relief, beneficial in GI procedures due to less constipation and urinary retention
Meperidine (Demerol) Routes
PO/IV/IM
Meperidine (Demerol) Nursing Considerations
Do not use in liver pts
Do not use for longer than 48-72 hours (applies to all opioids but especially this one)
Monitor for hypotension (will often see NS bag available in case of hypotension)
Semisynthetic Opioid
Hydromorphone (Diluadid)
Analgesic effect 6x more potent than morphine, fewer hypnotic effects and less GI distress
Hydromorphone (Diluadid) Routes and Onsets
PO/SQ/IM/IV
Faster onset and shorter duration of action than morphine
Gradual tolerance increase
Hydromorphone (Diluadid) Nursing Considerations
Gradual tolerance increase
IV 2 mg or less over 2-5 minutes
Monitor respirations and adequate hydration
Opioid Agonist-Antagonist Prototype
Naluphine (Nubain)
Relieve moderate to severe pain
Inhibition of pain impulse
Naluphine (Nubain) Pregnancy Category
Pregnancy Category B/D
Naluphine (Nubain) Routes and Onsets
IV 2-3 minutes
IM 15 minutes
Naluphine (Nubain) Sxs
Dizziness, confusion, hallucinations
Basically CNS depression sxs
Naluphine (Nubain) Adverse Reactions
Bradycardia, tachycardia (tends to come when pt has hypotension), respiratory depression, hypotension
Naluphine (Nubain) Life-threatening Reaction
Respiratory depression
Naluphine (Nubain) Contraindications
Hypersensitivity
Caution: high incidence of drug abuse, increased intracranial pressure, impaired respirations, renal or hepatic dx
Naluphine (Nubain) Drug Interactions
CNS depression with ETOH or other CNS depressants
Patient Controlled Analgesia (PCA)
Morphine, fentanyl, and dilaudid
IV route
Patient controlled
Lock-outs for patient to prevent overdose
Maintains constant analgesic level, avoiding episodes of severe pain and over sedation
Transdermal Opioid Analgesic
Duragesic (Fentanyl)
For chronic pain
24 hour pain control
Change patch every 24 hours
Also available IV/IM
Migraine
Unilateral throbbing head pain with N/V and photophobia
Last 2-24 hours
Caused by inflammation of blood vessels in cranium
Thought to be a serotonin imbalance
2/3 of women between 20-30 yrs old, decreases during pregnancy and menopause
Triggers: red wine, cheese, and chocolate
Cluster Headache
Severe unilateral non-throbbing pain usually around eye
Occurs in clusters of severe attacks for several days over several weeks
Occurs in men more commonly than women
Prevent Migraines
Beta blockers (Inderal, Tenormin)
Anticonvulsants (Valporic Acid), Neurontin
TCA (Elavil, Tofranil)
Cessation of Migraines
Analgesics, opioid analgesics, ergot alkaloids, SSRA (Triptans)
5-HT1 Receptor Agonist Prototype
Sumatriptan (Imitrex)
Treat migraines and cluster headaches
Causes vasoconstriction of cranial arteries
Sumatriptan (Imitrex) Pregnancy Category
Pregnancy Category C
Sumatriptan (Imitrex) Routes and Onsets
PO 30 min
SQ 10 min
Intra nasal 15 min
Sumatriptan (Imitrex) Sxs
Dizziness, fainting, tingling, N/V/D, abdominal cramps
Sumatriptan (Imitrex) Adverse Effects
HTN (more common than hypotension), hypotension, angina, dysrhythmias, thromboembolism (due to vasoconstriction)
Sumatriptan (Imitrex) Life-threatening Reactions
Coronary artery vasospasm, MI, cardiac arrest
Sumatriptan (Imitrex) Contraindications
Cardiovascular pts, HTN, DM, smoking, CAD, liver or renal dx