Pharmacology Flashcards

1
Q

Antidote for lorazepam (benzodiazepines)

A

Flumazenil

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2
Q

OD vodka (methanol)

A

Ethanol

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3
Q

OD Digoxin

A

Digoxin Specific antibodies

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4
Q

OD Paracetamol

A
  • activated charcoal if ingested < 1 hour ago
  • N-acetylcysteine (NAC)
  • liver transplantation
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5
Q

OD Salicylate

A
  • urinary alkalinization with IV bicarbonate
  • haemodialysis
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6
Q

OD Tricyclic antidepressants

A
  • IV bicarbonate may reduce the risk of seizures and arrhythmias in severe toxicity
  • arrhythmias: class 1a (e.g. Quinidine) and class Ic antiarrhythmics (e.g. Flecainide) are contraindicated as they prolong depolarisation.
  • Class III drugs such as amiodarone should also be avoided as they prolong the QT interval.
  • Response to lignocaine is variable and it should be emphasized that correction of acidosis is the first line in management of tricyclic induced arrhythmias
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7
Q

OD lithium

A
  • mild-moderate toxicity may respond to volume resuscitation with normal saline
  • haemodialysis may be needed in severe toxicity
  • sodium bicarbonate is sometimes used but there is limited evidence to support this. By increasing the alkalinity of the urine it promotes lithium excretion
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8
Q

Heparin antidote

A

protamine sulphate

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9
Q

Beta-blockers antidote

A
  • if bradycardic then atropine
  • in resistant cases glucagon
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10
Q

Ethylene glycol(antifreeze)

A
  • fomepizole
  • ethanol
  • haemodialysis
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11
Q

Methanol poisoning

A
  • fomepizole or ethanol
  • haemodialysis
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12
Q

Organophosphate insecticides intoxication

A

atropine
pralidoxime still unclear

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13
Q

OD Iron

A

desferrioxamine

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14
Q

Lead, arsenic, gold and mercury intoxication

A

dimercaprol
calcium edetate (lead)

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15
Q

CO intoxication

A
  • 100% oxygen
  • hyperbaric oxygen
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16
Q

Cyanide poisoning

A
  • Hydroxocobalamin;
  • also combination of amyl nitrite, sodium nitrite, and sodium thiosulfate
17
Q

Gynaecomastia

A
  • spironolactone (most common drug cause)
  • cimetidine
  • digoxin
  • cannabis
  • finasteride
  • GnRH agonists e.g. goserelin, buserelin
    oestrogens, anabolic steroids
18
Q

cocaine

A
  • cocaine blocks the uptake of dopamine, noradrenaline and serotonin

Treat: benzodiazepines,
- if myocardial infarction develops then primary percutaneous coronary intervention
- hypertension: benzodiazepines + sodium nitroprusside

  • cardiovascular
    coronary artery spasm → myocardial ischaemia/infarction
    both tachycardia and bradycardia may occur
    hypertension
    QRS widening and QT prolongation
    aortic dissection
  • neurological
    seizures
    mydriasis
    hypertonia
    hyperreflexia
  • psychiatric effects
    agitation
    psychosis
    hallucinations
  • others
    ischaemic colitis + rectal bleeding
    hyperthermia
    metabolic acidosis
    rhabdomyolysis
19
Q

Mirtazapine

A
  • antidepressant - blocking alpha2-adrenergic receptors

older people

  • sedation and an increased appetite,
20
Q

Macrolides side dffects

A

Motility issues
Arrhythmia
Cholestatic hepatitis
Rash
eOsinophilia

21
Q

Organophosphate poisoning

A

atropine is the antidote

inhibiting acetylcholinesterase

Salivation
Lacrimation
Urination
Defecation/diarrhoea
cardiovascular: hypotension, bradycardia
also: small pupils, muscle fasciculation