Pain therapeutics Flashcards
Only FDA indication for lidocaine 5% patch
post herpetic neuralgia
The normal processing of stimuli
nociceptive
An inbalance of pro-nociceptive and anit-nociceptive stimuli
dysfunctional pain
The drug of choice for trigeminal neuralgia
crbamazepine
MOA of gabapentin and pregabalin
bind to alpha-2-delta subunit of N-type Ca channels and block them
FDA approved used of gabapentin regarding pain
post herpetic neuralgia
Abnormal processing of sensory input that is caused by direct damage to the nervous system or persistent stimulaton of the nervous system by another pain source
neuropathic pain
Minimum effective dose of gabapentin
600 mg TID
FDA approval of pregabalin regarding pain
post herpetic neuralgia, diabetic peripheral neuropathy and fibromyalgia
Minimum effective dose of pregabalin
150 mg/day in 2-3 divided doses
MOA of katamine
NMDA receptor antagonist
MOA of TCAs
5HT/NE reuptake inhibition and Na channel block
5 cautions with TCAs
- BPH
- arrhythmia (QT prolongation)
- suicidal idealization
- hepatic failure
- renal failure
Opioid that is the most useful in neuropathic pain
Methadone
4 groups of 1st line agents for neuropathic pain
- TCAs
- Gabapentin and pregabalin
- Lidocaine patch (post herpetic neurophathy)
- SNRI (diabetic peripheral neuropathy)
3 groups of second line agents for neuropathic pain
- tramadol
- opioids
- capsaicin
2 opioids that are the most common for a patient to have a true allergy to
codeine and morphine
enzyme that metabolizes codeine to morphine
CYP2D6
4 opioids that have a risk of serotonin toxicity
- fentanyl
- tramadol
- meperidine
- methadone
the 4 A’s of pain
- Analgesia
- Adverse effects
- Activities of daily living
- Aberrant opioid-related behaviors
Opioid that has the worst nausea side effects
Codeine
enzyme that metabolizes hydrocodone to hydromophone
CYP2D6
Toxic metabolite of meperidine that has a longer half-life and no analgesic action
normeperidine
4 C’s of addiction
- Loss of control
- Continued use despite adverse consequences
- Compulsion to use
- Cravings