Mechanisms Flashcards

1
Q

Alpha receptor agonists and antagonists

A
Agonists = phenylephrine (sinus congestion)
antagonists = doxazosin/ tamsulosin (HTN/ BPH)
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2
Q

Beta 1 receptor agonists and antagonists

A
agonists = NA
antagonists = all beta blockers eg atenolol + bisoprolol
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3
Q

Beta 2 receptor agonists and antagonists

A
agonists = salbutamol
antagonists = non selective beta blockers eg propranolol
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4
Q

Dopamine receptor agonists and antagonists

A
Agonist = parkinsons drugs 
Antagonists = anti-emetics, antipsychotics
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5
Q

GABA receptor agonists and antagonists

A
agonists = benzodiazepines
antagonists = NA (used in benzo OD)
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6
Q

H2 + H1 receptor agonists and antagonists

A

H2 antagonists = ranitidine (dyspepsia)

H1 antagonist = hayfever meds

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7
Q

muscarinic receptor agonists and antagonists

A
agonists = pilocarpine (for glaucoma)
antagonists = atropine, ipratropium bromide (used for urge incontinence)
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8
Q

Zero order kinetics

A

Metabolism which is independent of concentration of reactant
Due to metabolic pathways becoming saturated

Phenytoin
High dose aspirin
Heparin
Ethanol

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9
Q

PPI action

A

Inhibit H+/ K+ ATPase that transports H+ out of parietal cells

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10
Q

What part of the brain is infarcted if you get hemiplegia/ hemiparesis?

A

Internal capsule

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11
Q

Opioid agonists + antagonists

A

Agonists = opioids + loperamide

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12
Q

Side effects of bisphosphonates

A

Jaw osteonecrosis

Oesophagitis - take sitting up

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13
Q

Serotonin antagonists + agonists

A

Antagonists: used for N+V in chemo

Agonists = rescue meds for migraine

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14
Q

Monitoring while on methotrexate

A

FBC, LFT, U+E

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15
Q

Action of LMWH

A

Inhibits factor Xa

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16
Q

How to reverse action of LMWH

A

Protamine sulphate

17
Q

What is the SE caused by combination of statins + macrolides?

A

Myopathy

18
Q

What is the SE caused by combination of ACE inhibitors + metformin?

A

Hypoglycaemia