MSK/Migraine Case Review Dobbs (Final) Flashcards
Goals of pain management therapy
- Decreased pain
- Decreased healthcare utilization
- Improved functional status
- Improved quality of life
Name some non-pharmacologic pain treatment options
- Heat/cold
- Meditation/Relaxation
- Guided imagery
- Acupressure/Acupuncture
- TENS units
- Physical Therapy
- Chiropractic Care
- Behavioral Therapy
- Cognitive/Behavioral Therapy
- Therapeutic Massage
Name some Pharmacologic pain treatment options
- NSAIDs
- Non-opioid analgesics
- Anti-seizure medications
- Anti-depressants
- Opioid analgesics
- Local anesthetics
What are some invasive therapies in the treatment of pain?
- Trigger Point Injections
- Joint Injections
- Regional Nerve Blocks
- Epidural Injection
- VArious Surgeries
MOA of Acetaminophen (APAP)
Dobbs said to know the MOAs of the various meds
- Inhibit the syntheses of prostaglandins in the CNS
- Works peripherally to block pain impulse generation
- Poor inhibitor of platelet function
- Very little anti-inflammatory properties
Dosage of APAP/Tylenol
- Comes in 326mg, 500mg (extra strength) and 650mg (Arthritis)
- Max recommended dose is 4g daily
- In elderly Pts some clinicians have recommended lowering the max dose to 3 grams daily
What is APAP most commonly recommended for?
- Anti-pyresis
- Relief of pain from:
- Osteoarthritis
- Migraine headaches
- Skeletal pain
- Muscular pain
- Pain in pregnant women
What is the antidote for APAP?
N-acetylcystine (Mucomyst)
MOA of Salicylates (Aspirin/ASA)
- Reduces prostaglandin and thromboxane A2 synthesis
- Reduces platelet aggregation
- Irreversibly inhibits platelet function for the life of the platelet, interfering with homeostasis and prolonging bleeding time
Dosage of ASA
- Comes in:
- 81mg (Baby)
- 325mg
- 500mg (Extra-strength)
S/E of ASA
- Gastrointestinal tact injury/upset
- Renal injury
- Viral syndromes in children and teenagers
- Risk of Reye’s syndrome
- A single dose of aspirin can precipitate asthma in aspirin-sensitive patients
ASA is most commonly recommended for?
- Ant-coagulation
- Anti-pyresis
- Relief of pain from
- Osteoarthritis
- Migraine headaches
- Muscular pain
Name some common Nonselective NSAIDs
- Ibuprofeb
- Naproxen
- Naproxen sodium
- Indomethacin
- Etodolac
- Diclofenac
- Sulindac
What is the one selective NSAID we need to know?
Celecoxib
If a Pt does not respond to one NSAID should you throw out the entire class?
No, some Pts respond better to one NSAID than another
NSAIDs are most commonly recommended for?
- Anti-pyresis
- Relief of pain/inflammation from:
- Dysmenorrhea
- Migraine/tension headaches
- Muscular/tendinous pain from strain/sprain
NSAIDs are NOT recommended for?
- Fracture pain
- Can delay bone healing
- Pregnant women
- Known history of PUD
- Renal dysfunction
- Bleeding disorders
- Uncontrolled HTN
- Use caution in Pts with
- Current nausea/vomiting
- GERD
Name two parenteral NSAIDs and how long can they be used for?
- Ketorolac (Toradol)
- Most commonly used injectable
- IV ibuprofen (Caldolor)
- Recently approved for use in people 6 months and older
- Approved as an antipyretic and for use in moderate to severe pain either alone or in conjunction with opioid therapy.
- Recently approved for use in people 6 months and older
- Short-term use
- Up to 5 days
S/E of Ketorolac (Toradol)
- Severe GI toxicity
- Especially in the elderly
- Acute renal failure has been observed
- In every age group from as little as a single dose IM
- No additional analgesic benefit to giving 60 mg vs 30 mg
- 60 mg dose only lasts longer
- High-risk patients for Toradol
- > 65 with known vascular or renal disease
- Dosage should be but in half or not given at all
- > 65 with known vascular or renal disease
Parenteral NSAIDs are recommended for?
- Outpatient relief of pain/inflammation from
- Migraine headaches
- Severe pain
MOA of NSAIDs
The main mechanism of action of NSAIDs is the inhibition of the enzyme cyclooxygenase (COX). Cyclooxygenase is required to convert arachidonic acid into thromboxanes, prostaglandins, and prostacyclins. [9] The therapeutic effects of NSAIDs are attributed to the lack of these eicosanoids.
S/E of Non-Selective NSAIDs
- Exacerbation or development of CHF
- Increased BP
- Can precipitate asthma and anaphylactoid reaction in aspirin-sensitive Pts
- Reversible inhibition of platelet aggregation
- GI Problems
- Bleeding
- Ulceration and perforation
- High doses, prolonged use, previous peptic ulcer disease, excessive EtOH use, and advanced age increases the risk of these complications.
- Ibuprofen can interfere with the antiplatelet effect of Aspirin
- Do not give to Pts taking Aspirin for CV protection, if need to give, give 2 hours after taking aspirin.
How can NSAIDs cause HTN and renal disease?
- NSAIDs decrease the synthesis of renal vasodilator prostaglandins and decrease renal blood flow, which can lead to fluid retention and may cause renal failure or HTN
- Risk factors include advanced age, congestive heart failure, renal insufficiency, ascites, volume depletion and concurrent diuretic therapy
- Hepatotoxicity can occur
Dosing guidelines for Ibuprofen
- Ibuprofen
- Comes in 200 mg, 400 mg, 600 mg, and 800 mg tabs
- Usual Doses
- 200-600 mg
- 800 mg (Rx)
- Dose Frequency
- Q4-6 hrs
- Q8hr if 800mg
- Max dose
- 2400 mg
- 3200 mg if taking 800mg Q8
Dosing guidelines for Naproxen
- Naproxen
- Comes in 250 mg, 375 mg, and 500 mg tabs
- Dose
- 250-500 mg
- Dose Frequency
- Q6-8 hrs
- Q12hr if taking 500 mg
- Max dose
- 1000 mg
Dosing guidelines for Naproxen Sodium (Aleve)
- Naproxen
- Comes in 220 mg, and 550 mg tabs
- Dose
- 220-550 mg
- Dose Frequency
- Q6-8 hrs
- Q12hr if taking 550 mg
- Max dose
- 1100 mg
Dosing for Selective COX-2 inhibitors (Celebrex)
100-200 mg BID
S/E of Selective COX-2 inhibitors (Celebrex)
- Less GI toxicity and non-selective NSAIDs
- Increased MI and CVA risks
- No inhibition of platelet aggregation or increase bleeding time
- May cause increased INR/PT if given with warfarin
- Unlikely to be clinically significant
- Similar S/E to non-selective NSAIDs
Antidote for NSAIDs
None exist
When using opioids for short term relief of pain should you use short or long-half life opioids?
Short half-life
Which opioid when given with cyclobenzaprine greatly increases the risk of seizure?
Tramadol
Which of the opioids are considered “stronger”?
- Fentanyl
- Hydromorphone
- Levorphanol
- Meperidine
- Methadone
- Morphine
- Oxycodone
- Oxymorphone
Which of the opioids are considered “weaker”?
- Hydrocodone
- Codeine
- Tramadol
Do Opioids have a ceiling for their analgesic effectiveness?
No unlike NSAIDs, opioids generally have no ceiling for their analgesic effectiveness except that imposed by their adverse effects
Which opioids do you need to use caution when prescribing with NASAIDs or APAP?
- Vicodin
- Vicoprofen
- Percocet
These meds contain an NSAID or APAP and when given with NSAIDs or APAP increase the risk of overdose on NSAID or APAP
Describe Oxycodone (Percocet, OxyContin)
- Semi0synthetic derivative of morphine
- Only available in oral formulations
- High oral bioavailability
- 2.5-3 hour half-life
- 9.5 times more potent than oral codeine
- 1.5 time more potent than oral morphine
Describe Hydromorphone
- The one that starts with “D” - Dilaudid
- Available in IV, IM, SubQ, rectal, and short- and long-acting oral formations
- Maybe more safe than morphine in Pts with renal failure
- Morphine can lead to toxic metabolite accumulation
- Immediate-release oral preparations have an onset of 30 minutes and a duration of 4 hours
Describe Fentanyl
- Available in IV, intrathecal, epidural, transdermal, and oral transmucosal preparations
- Also available in buccal soluble film, sublingual tablet, nasal spray, sublingual spray, and as a lozenge on a stick for breakthrough pain, especially in cancer patients.
- 80 times more potent than morphine
- Highly lipophilic and binds strongly to plasma proteins
- Transdermal is useful in Pts with chronic pain who have difficulty swallowing or malabsorption
- Exposing patch to heat or possibly high fever could increase the release of the drug
- Use of fentanyl with drugs that inhibit CYP3A4 can cause a dangerous increase in serum concentrations of fentanyl
- Use extreme caution in strong inhibitors such as ketoconazole or clarithromycin