Side effects and contraindications Flashcards
Aspirin, warfarin and heparin
Do not give to patients with bleeding risk (e.g. prolonged prothrombin time due to liver disease).
Remember prophylactic heparin is contraindicated in acute ischaemic stroke due to bleeding risk.
Steroid side effects?
Stomach ulcers Thin skin Oedema Right and left heart failure Osteoporosis Infection (including candida) Diabetes (more often hyperglycaemia) Cushing's syndrome
NSAID side effects and contraindications?
NSAID No urine (renal failure) Systolic dysfunction (heart failure) Asthma Indigestion (any cause) Dyscrasia (clotting abnormality)
Antihypertensives side-effect
Hypotension
Beta blockers
Bradycardia, wheeze in asthmatics, worsening of acute heart failure (but effective in chronic heart failure)
Calcium channel blockers
Bradycardia, peripheral oedema, flushing
ACE inhibitors
Electrolyte disturbance (hyperkalaemia) and dry cough
Diuretics - loop and K sparing
Electrolyte disturbance, renal failure.
Loop (e.g. furosemide) can cause gout. K sparing (e.g. spironolactone) can cause gynaecomastia.
Thiazide diuretics
Cause hypokalaemia by increasing potassium excretion by the kidneys.
Metoclopramide
Passes blood brain barrier and can exacerbate parkinsonian symptoms. Domperidone does not pass the BBB and is therefore safer.
Methotrexate
Withhold in potential sepsis!
Trimethoprim and methotrexate
Both are folate antagonists and cannot be taken together. This can lead to pancytopenia and neutropenic sepsis, due to bone marrow toxicity.
Prophylactic enoxoparin
Contraindicated following acute stroke (approximately for 2 months but varies by trust)
Clozapine
Agranulocytosis resulting in neutropenia
Digoxin toxicity effects
Confusion, nausea, visual halos, arrythmias
Lithium toxicity effects
Early - tremour
Intermediate - tiredness
Late - arrythmias, seizures, coma, renal failure, diabetes insipidus
Phenytoin toxicity side effects
Gum hypertrophy, atazia, nystagmus, peripheral neuropathy, teratogenicity
Gentamicin and vancomycin toxicity side effects
Ototoxicity and nephrotoxicity
Side effect of carbamazapine
Can lead to SIADH and therefore hyponatraemia
Slow AF
Withold digoxin
SIADH as a side effect
sulfonylureas* SSRIs, tricyclics carbamazepine vincristine cyclophosphamide
Drugs to be avoided during breastfeeding
antibiotics: ciprofloxacin, tetracycline, chloramphenicol, sulphonamides psychiatric drugs: lithium, benzodiazepines aspirin carbimazole methotrexate sulfonylureas cytotoxic drugs amiodarone
Drugs which can be given for women who are breastfeeding
antibiotics: penicillins, cephalosporins, trimethoprim
endocrine: glucocorticoids (avoid high doses), levothyroxine*
epilepsy: sodium valproate, carbamazepine
asthma: salbutamol, theophyllines
psychiatric drugs: tricyclic antidepressants, antipsychotics**
hypertension: beta-blockers, hydralazine
anticoagulants: warfarin, heparin
digoxin
What is tramadol notorious for?
Confusion in the elderly
What does cyclizine cause as a side effect?
Drowsiness and confusion can occur
When is methotrexate contraindicated?
In active infection
What are the rules surrounding use of NSAIDS and methotrexate
Use with caution as there is a risk of nephrotoxicity