Pharmacology Flashcards
(156 cards)
Adrenaline anaphylaxis: how many ml?
0.5ml 1:1000 IM
adrenaline cardiac arrest
1mg - 10ml 1:10,000 IV or 1ml of 1:1000 IV
What receptors does adrenaline work on? (2)
acts on α 1 and 2, β 1 and 2 receptors
(causes vasoconstriction in the skin and kidneys causing a narrow pulse pressure)
amioderone:
what skin complications? (2)
Cardiac? (3)
thyroid (1)
lung (1)
liver (1)
eye (1)
Skin:
1- slate grey appearance
2- photosensitivity
Cardiac:
1- arrhythmias
2- bradycardia
3- QT lengthening
Thyoid:
1- thyroidm (hyper and hypo)
Lung
1- pulmonary fibrosis
Liver:
1- liver hepatitis
Eye:
1- corneal depositis
amiodarone interactions (2)
decreased metabolism of warfarin, therefore increased INR
increased digoxin levels
TB drug causing peripheral neuropathy
isoniazid
TB side effects
A patient has recently started treatment for TB….
1) they noticed feeling numbness in their fingertips
2) they noticed difficulty recognising colours (optic neuritis)
3) they notices their tears are orange
4) pain in their big toe (gout/ arthralgia/ myalgia)
1) I’m-so-numb-azid (Isoniazid)
2) eye-thambutol (Ethamutol)
3) red-an-orange-pissin (Rifampicin) - hepatitis, orange secretions
4) pyrazinamide
finasteride how does it work?
inhibitor of 5 alpha-reductase
used for BPH, male pattern baldness
adverse effects finasteride?
impotence
decreased libido
ejaculation disorder
gynaecomatsia
HRT: cyclical or not?
cyclical for premenopausal women as replicates normal cycles and doesn’t have breakthrough bleeding
Metformin contraindications?
- CKD: review if eGFR <45 , stop <30
- lactic acidosis if tissue hypoxia (e.g. recent MI, sepsis, AKI, severe dehydration)
- alcohol abuse
- iodine contrast
Salicylate overdose (2)
IV bicarbonate
haemodialysis
benzodiazepine overdose management
flumazenil
(only if v severe or iatrogenic due to risk of seizures)
Flumazenil can precipitate withdrawal seizures in patients with chronic benzodiazepine use and is therefore contraindicated in this patient group.
TCA overdose
IV bicarbonate
warfarin antidote if severe bleeding
Vit K + prothrombin complex
heparin antidote
protamine sulphate
BB antidote
atropine
if resistant –> glucagon
iron overdose antedote
desferriozamine (chelating agent)
lead overdose antidote
dimercaprol, calcium edetate
CO overdose management
100% O2
cyanide overdose management
Hydroxocobalamin
dehydration and lithium causes…
toxicity
normal levels = 0.4-1.0 (toxicity >1.5)
lithium toxicity management
FLUIDS
monitor serum sodium closely (every 4hr with lithium level)
haemodialysis if severe toxicity
adverse effects ahminoglycosides (gentamicin)
ototoxicity
nephrotoxicity
both peak (1 hour after administration) and trough levels (just before the next dose) are measured
if the trough (pre-dose) level is high the interval between the doses should be increased
if the peak (post-dose) level is high the dose should be decreased