Pain Flashcards
Mild pain we would use….
Non opiates: paracetamol, NSAIDs,aspirin
Mid to moderate pain we would use… what is a major caution for the third option
codeine, dihydrocodeine - more moderate - tramadol (lower seizure threshold,serotonin syndrome,increased bleeding risk, psychiatric disorder)
Moderate pain we would use… and what are main side effects for one of them
morphine, oxycodone , methadone, buprenorphine and fentanyl (morphine side effects : dependence so daily dose increases, hitting max based in weight)
Weak opiates: what are the age limits and what age is not licensed? What other groups of people is it contraindicated in? Descent and medical procedures?
codeine: used in patients over the age of 18 - over age of 12 (unlicensed) and those who have had tonsils removed due to sleep apnoea. Avoid in patients who have high metabolism (Afro Caribbean) due to toxicity) + avoid in breast feeding patients
What pathway do opiates act one? Considering that, what side effects do we expect?
Acts on the mu- pathway so causes dry mouth, constipation, cons depression, nausea and vomiting, myosis(pupil constriction )
Strong opiates prolonged use can lead to what regarding sensitivity and payments suffering from what do we avoid them in? in?
Prolonged use leads to - hyperalgesia(increased sensitivity to pain) - smaller sensation - more pain so more opiates. Avoid in paralytic ileum, respiratory disease and head injury
Break through pain
1/6th or 1/10th of total dose every 2-4 hours needed
Increase doses of opiates
by 1/2 to 1/3 each day
Reduce by morphine dose by what? Each day to prevent what?
by 1/2 to 1/3 each day when switching to prevent overdose
Max Breakthrough dose - which is the most potent and appropriate in patients who can’t consume a lot because of nausea???
MAX Breakthrough doe (1/6 to 1/10) every 2 hours so 12x a day max
- Oxycodone more potent and more appropriate in pts who can’t consume a lot due to nausea
Analgesics examples? What are they useful in? Where would we opt for opioids instead?
- Nsaids, Aspirin and paracetamol useful in muscoskeletal pain
- Opioids useful in visceral[ trunk,heart,abdominal and pelvic organs] pain and moderate to severe pain
Sickle cell disease can be treated using what? What do we use for a severe crisis? What do we want to avoid
- Paracetamol and NSAIDs, codeine and dihyrocodiene
- Severe crisis - morphine or diamorphine may be needed
- Avoid pethidine- can cause seizures
Paracetamol is indicated with what kind of pain?
Mild to moderate pain, pain and inflammation of soft tissue injuries, Pyrexia with discomfort
Dental and Orodacial Pain:
First line can be treated using what? What can we combine? What is final line and what properties does it have that will help this? And we can only prescribe for how long?
- NSAIDs(ibuprofen,diclofenac,aspirin). Paracetamol can be used temporarily.
- Benzydamine mouthwash/spray can be used
- Paracetamol,ibuprofen, aspirin are adequate for dental pain
- Combining a non-opioid with an opioid analgaesic provides more relief than either on its own.
- Diazepam- has muscle relaxant and anxiolytic properties (only prescribe short term)
Dysmenorrhoea(period pain) what can we use to treat the pain? What do we use to test the vomiting? What else can be prescribed to aid with this whole cycle?
- Antiemetics can be used to prevent vomiting
- Paracetamol and NSAIDs used for relief
- Oral contraceptives can be used to prevent pain associated with ovulatory cycles
Non - opioid analgaesics: examples and agar can they each cause what can they cause???what can be used in pain not responding to non opioid analgesics
- Aspirin - indicated for headaches, musculoskeletal pain, dysmenorrhoea and pyrexia
- GI problems, minimised by taking dose after food. Enteric coating preps have a slow onset of action and therefore unsuitable
- Aspirin interacts with other drugs especially warfarin which is a special hazard
- Paracetamol, generally safer and more preferred for elderly- overdose can cause hepatic damage
- Nefopam can be used for pain not responding to non - opioid analgaesics it has more side effects
NSAIDs can be used for what kind of diseases? It is a short term treatment for what? What would we rather go for in elderly patients?what types of NSAID are preferred with risk of gi effects
- Chronic disease accompanied by pain and inflammation
- Short term treatment of mild to moderate pain(musculoskeletal)but paracetamol now preferred especially in elderly
- Suitable for dysmenorrhoea
- Pain caused by secondary bone tumours
- Selective inhibitors or cyclo-oxygenate-2 preferred over NSAIDs for patients with high risk of gi side effects
- Used for post operative analgesia
Compound analgesic preparations- examples? What is a weak stimulant the enhances analgesic effect? Example of combo prep that is no longer licensed
- Compound preparations eg. Co-codamol are commonly used but advantages have not been proven because we can’t titrate doses
- Caffeine is a weak stimulant and enhances analgesic effect
- Co- proxamol tablets- no longer licensed because of safety concerns
Opioid analgesic & dependence:
What are they used to treat? What can repeated doses lead to? When would we caution?
- Used to relief moderate to severe pain particularly of visceral origin
- Repeated use may cause dependence and tolerance
- Caution in impaired respiratory function(avoid in cold),asthma,hypotension,MG,shock,cons=vulsive disorders
Common opioid side effects:
3
1) Respiratory depression: treated by artificial ventilation or reversed by naloxone
2) Dependence and withdrawal :tolerance can develop during long term use
3) Overdose:Cause coma,respiratory,depression and pinpoint pupils
Other side effects of opioids include?
- Nausea and vomiting
- Constipation
- Dry mouth
- Hillary spasm
- Larger doses- muscle rigidity,hypertension,respiratory depression
- Long term use-hypogonadism and adrenal insufficiency
- Drowsiness
Pregnancy: nsaids which trimester are the contraindicated in? What is there an increased risk of?
NSAIDs are contraindicated in the third trimester of pregnancy. This means they should not be used from week 28 of pregnancy. This is due to the increased risks of constriction of the ductus arteriosus and renal dysfunction, which are greater in the last trimester
Strong opioids:
MORPHINE is the most…. According to which standards? How often is it given?
- Most valuable opioid analgesic for severe pain(gold standard) despite causing nausea and vomiting
- Confers euphoria and state of detachment in addition to pain relief
- Given every 4 hours (every 12 to 24 hours as modified release preps)
STRONG OPIODS - Buprenorphine has both? But it may precipitate? What can abuse cause? What does it have a longer duration of action tha? How effective are sublingual? What can the effects be partially reversed by?
- Has both agonist and antagonist properties(both = bu)
- May precipitate withdrawal symptoms
- Abuse potential+ may cause dependence
- Longer duration of action than morphine
- Effective sublingual for 6-8 hours
Compared to other opioids, effects are only partially reversed by naloxone
