Pharmacology Flashcards
management of paracetamol overdose
n-acetylcysteine
activated charcoal if presented within 1 hour
pH needed for a liver transplant in paracetamol overdose
less than 7.3 after 24 hours
management of salicylate poisoning
IV bicarbonate and haemodialysis
ABG and ECG in salicylate poisoning
mixed respiratory and metabolic acidosis
prolonged QRS
management of opioid overdose
naloxone
opioid detoxification in the community
buprenorphone / methodone
management of benzodiazepine overdose
flumazenil if severe or iatrogenic as risk of seizure
otherwise supportive
management of tricyclic antidepressant overdose
IV bicarbonate and dialysis
presentation of tricyclic overdose
anticholinergic side effects (arrhythmia, seizure, coma)
ABG and ECG in tricyclic overdose
ABG: metabolic acidosis
ECG: sinus tachycardia and prolonged QRS
management of lithium overdose
IV saline and haemodialysis
coarse tremor, increased reflexes, confusion, polyuria, seizure and coma are found in an overdose of what?
lithium
what can precipitate a lithium overdose
dehydration / renal faiure / NSAIDs / thiazides / ACEI/ARB / metronidazole
management of warfarin overdose
vitamin K and prothrombin complex
management of heparin overdose
protamine sulphate
management of BB overdose
atropine if low heart rate
management of ethylene glycol and methanol overdose
fomepizole and haemodialysis
ethanol for methanol
ABG in ethylene glycol poisoning
metabolic acidosis with a high anion gap
moa of fomepizole
inhibits alcohol dehydrogenase
management of organophosphate poisoning
atropine
reduced heart rate, miosis, salivation, lacrimation, urination, diarrhoea, reduced bp and fasciculations in an overdose of what
organophosphates (insesticides)
which overdose is desferrioxamine used for
iron
management of theophylline overdose
haemodialysis
confusion, pink mucosa and low grade fever
carbon monoxide poisoning
management of carbon monoxide poisoning
100% oxygen
which drug causes colourful visual hallucinations, psychosis, paranoia, depersonalisation
management
LSD
Lorazepam
which drug causes agitation, anxiety, confusion, ataxia, tachycardia, HTN, hyponatremia, pyrexia and rhabdomyolysis
management
ecstasy
supportive
which drug causes htn, prolonged QT, seizures, reduced tone, increased reflexes, agitation, psychosis, hallucinations, ischaemic colitis, pyrexia, rhabdomyolysis and metabolic acidosis
management
cocaine
benzodiazepines
MOA of benzodiazepines
blocks dopamine, noradrenaline and serotonin
which medication causes nausea, vomiting, anorexia, confusion, YELLOW GREEN VISION, AV block, bradycardia, acidosis and electrolyte disturbances when overdosed
digoxin
MOA of digoxin
positive inotrope which inhibits the Na/K ATPase pump for rate control of the heart
which medication can precipitate digoxin toxicity
thiazides
how do you manage digoxin toxicity
monitor K and correct arrhythmias
digoxin specific antibody (digiband)
how many hours post dose do you check digoxin levels
6-12 hours
how many hours post dose do you check lithium levels
12 hours
when do you check ciclosporin and phenytoin levels
immediately before the dose
which drug would you monitor LFT at baseline, 3m and 12m
statins
which drug would you monitor U+E at baseline, when the dose changes and annually
ACEi
which drug would you monitor baseline TFT, U+E, LFT, CXR and 6 monthly TFT and LFT
Amiodarone
which drug would you monitor FBC, LFT, U+E at baseline then weekly until stable then every 3m
methotrexate
which drug would you monitor TFT, U+E baseline then every 6m
drug levels weekly until stable then every 3m
lithium
which drug would you monitor LFT and FBC baseline then LFT during the first 6m
sodium valproate
which drug would you monitor LFT baseline and regularly
glitazones
which diabetic drug caused GI disturbance, lactic acidosis (stop in MI) and nephrotoxicity (stop if eGFR under 30)
metformin
which diabetic drug causes hypoglycaemia, weight gain, increased appetite, SIADH and cholestatic liver disease
sulphonylureas
which diabetic drug causes increased weight, fluid retention, liver dysfunction and fractures
glitazones
which diabetic drug causes pancreatitis
gliptins
which TB medication inhibits RNA polymerase and can cause hepatitis, flu like symptoms and orange bodily fluids
RIFAMPICIN
which TB medication inhibits myoclonic acid and causes peripheral neuropathy, hepatitis and agranulocytosis
ISONIAZID
how do you treat isoniazid induced peripheral neuropathy
pyridoxine
which TB medication inhibits enzymes and causes, optic neuritis and renal impairment
ETHAMBUTOL (check visual acuity before starting)
which receptor do decongestants such as phenylephrine and oxymetazoline work on
alpha 1 agonist
which receptor does topical brimonidine for glaucoma work on
alpha 2 agonist
which receptor does tamsulosin for BPH and doxasoin for HTN work on
alpha antagonist
SE of alpha antagonists
drowsy, dry cough, SOB, postural hypotension
which receptor do inotropes such as doxybutamine work on
beta 1 agonist
which receptor do selective and non-selective beta blockers such as atenolol and bisoprolol work on
beta 1 antagonist
which receptor do bronchodilators such as salbutamol work on
beta 2 agonist
which receptor do non selective beta blockers such as propanolol and labetalol work on
beta 2 antagonist
which receptor do Parkinson’s medications such as ropinirole work on
dopamine agonist
which receptor do antipsychotics such as haloperidol and antiemetics such as metoclopramide and domperidone work on
dopamine antagonist
which receptor do benzodiazepines and baclofen work on
GABA agonist
which receptor does flumenezil work on
GABA antagonist
which receptor do antihistamines such as loratadine work on
histamine 1 antagonist
which receptor do antacids such as ranitidine work on
histamine 2 antagonist
which receptor do glaucoma medications such as pilocarpine work on
muscarinic agonist
which receptor does atropine, ipratropium and oxybutynin work on
muscarinic antagonist
which receptor do depolarising muscle relaxants such as suxamethonium and vareniciline for smoking cessation work on
nicotinic agonist
which receptor do non depolarising muscle relaxants such as atracurium work on
nicotinic antaognist
which receptor does syntocinon for labour induction work on
oxytocin agonist
which receptor do triptans for migraine work on
serotonin agonist
which receptor do anti emetics such as ondansetron work on
serotonin antagonist
name three medications used for motion sickness
hyoscine - cyclizine - promethazine
why is cyclizine used in caution in heart failure
reduces the cardiac output
fast onset symptoms of increased reflexes, clonus, dilated pupils, confusion, rigidity, tachycardia, hypertension, pyrexia and sweating
serotonin syndrome
slow onset symptoms of reduced reflexes, lead pipe rigidity, normal pupils, rigidity, tachycardia, hypertension, pyrexia and sweating
neuroleptic malignant syndrome
difference in the cause of serotonin syndrome and neuroleptic malignant syndrome
serotonin: SSRI, MAOi, ecstasy
neuroleptic: antipsychotics
management of serotonin syndrome and neuroleptic malignant syndrome
IV fluids and benzodiazepines
chlorpromazine in resistant serotonin
dantrolene in resistant neuroleptic
SE of the following medications: tricyclic antidepressants, NSAID, opioids, disopyramide, anticholinergics (antipsychotics and antihistamines)
urinary retention
dosages of adrenaline in anaphylaxis and arrest
1:1000 IM 0.5mg-0.5ml in anaphylaxis
1:10000 IV 1mg-10ml or 1:1000 1ml in arrest
MOA of aspirin
non reversible COX 1 and 2 inhibitor
aspirin before a tooth extraction
take as normal
which medication can cause urticaria
aspirin
% of carboxyhaemoglibin in smokers
10%
side effects of CCB
ankle swelling, headache, flushing
nifedipine: peripheral vasodilation and reflex tachycardia
diclofenac in CVD
contraindicated
flecainide in AF
check for structural heart disease
2 causes of reduced Mg and presentation
PPI and chronic alcoholism
similar presentation to Ca deficiency
amiodarone and thyroid disease
causes thyroid dysfunction but can be continued when you add levothyroxine
which medication causes corneal opacitis, pulmonary fibrosis and optic neuritis
amiodrone
immunosuppressant used post transplant and for RA, UC, psoriasis and pure red cell aplasia which causes nephrotoxicity, hepatotoxicity, impaired glucose tolerance, fluid retention, hair and gum growth
ciclosporin
which medication reduces seizure threshold and is contraindicated in G6PD deficiency
ciprofloxacin
what is the safest opioid in renal failure
oxycodone
MOA of spironolactone and amiloride
potassium sparing diuretics
2 antibiotics to monitor in renal failure
vancomycin
gentamycin
why does alcohol cause you to go to the toilet
ethanol inhibits vasopressin (ADH) secretion
how long do you continue HRT for in premature menopause
until the age of 50
MOA, monitoring and SE of unfractionated heparin
activates antithrombin III
monitor with APTT
can cause drug induced thrombocytopenia
which medication causes impotence, reduced libido, gynaecomastia, ejaculation disorders and reduced PSA
5 alpha reductase inhibitor (finasteride)
which medication caused headaches, blue discolouration, nasal congestion, flushing, priapism and GI disturbance
phosphodiesterase V inhibitor (sildenafil)
what is finasteride used to treat
BPH
name the drugs which induce the CYP450 enzyme system
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name the drugs which inhibit the CYP450 enzyme system
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