Drugs Year 1 Med Flashcards
Paracetamol (Acetaminophen)
Antipyretic / Analgesic
Inhibits COX1/COX2 to stop prostaglandin release
Can cause fats heart rate and low blood pressure
Overdose - thrombocytopenia, renal tubular necrosis, hypoglycemic coma
Ibuprofen
NSAID - minor aches and pains, reduce fever
Blocks COX1/2 stop prostaglandin releases
Overdose - dizziness, abdominal pain, ringing in ears, nausea, bloating, gas
rare cases - apnea, metabolic acidosis hyperkalemia and renal failure
Codeine
opiod central analgesic, sedative, hypnotic
targets mu opiod receptor when converted into morphine in the body
risks - confusion, shallow breathing, nausea vomiting, lack of appetite, respiratory depression
can cause uncontrolled epilepsy
Chlorpheniramine
allergic reactions, hay fever, rhinitis, urticaria, and asthma
H1 Antagonist - inhibit histamine release
can cause sedation, blurred vision
Cimetidine (Gaviscon)
inhibits gastric acid secretion, as well as pepsin and gastrins output - antacid = used for peptic ulcer, heartburn, GERD
competitively H2 antagonist
overdose - nausea, vomiting, diarrhoea, difficulty breathing, tachycardia
Aspirin (Acetylsalicylic acid)
anti-inflammatory and antipyretic, inhibits platelet aggregation used to prevent stroke, MI, unstable angina, TIA
irreversible, nonselective COX inhibitor, reduces synthesis of thromboxane A2
don’t use 1st and 2nd trimester pregnancy
used in children older than 16
can cause bronchospasm, tinnitus, GI irritation, ulceration and haemorrhage
Unfractionated/LMW Heparin
anticoagulant - binds reversibly to antithrombin iii and stimulates it to inactivate factor iia and xa
uses - prevent post op DVT, pulmonary embolism, unstable angina, patients with atrial fibrillation
can induce thrombocytopenia, long term use associated with osteoporosis, internal/external bleeding
LMW - less specific for thrombin
Warfarin
anticoagulant - vitamin K antagonist (inhibits vit K epoxide reductase, blocks clotting factors ii, vii, ix, x
used in pul embolism, atrial fib, cardiac valve replacement, reduce MI, stroke, TIA risk
can cause major bleeding in GIT, epistaxis (nose bleeds) and ecchymoses (bruising)
if overdoes give vit k or prothrombin
can cause foetal warfarin syndrome - 2nd 3rd Trimester = microcephaly, seizures etc
Factor VIII
antihaemophillic - helps for platelet plug
used to control patients with haemophilia A or aqruied factor VIII deficiency
Abciximab
inhibits platelet aggregation
binds to glycoprotein IIb/IIIa on platelets (prevents binding of adhesive molecules such as VWF/fibrinogen)
Clopidogrel
platelet aggregation inhibitor, reduce risk of (ST elevated) MI, stroke and ACS (acute coronary syndrome)
irreversible bind to P2Y receptors on platelets (stops binding of ADP)
can cause haemorrhage, hepatic/renal impairment
overdose needs blood transfusion as binds for 11 days
Streptokinase
thrombolytic agent - eliminate blood clot or arterial blockages
binds to plasminogen which converts it to plasmin - degrades fibrin/fibrinogen clots
Sildenafil
vasodilator, prevents breakdown of cGMP (inhibits PDE5)
treat ED, pul hypertension
Captopril
competitive ACE inhibitor - stops conversion of AT1 - AT2
used in the treatment of hypertension
overdose can leads to hypotension, emesis and angioedema
Selegiline (Emsam)
irreversible type B monoamine oxidase inhibitor
used to treat ADHD, major depression disorder, parkinson’s disease at low doses
Phenelzine (Nardil)
Monoamine oxidase inhibitor - blocks breakdown of serotonin, epin, dopa, norepin.
used to treat major depression, anxiety disorder, panic disorder
Isocarboxazid (Marplan)
irreversible Monoamine oxidase inhibitor - blocks breakdown of serotonin, epin, dopa, norepin.
used to treat major depression, atypical disorder, panic, phobias
Duloxetine
serotonin and norepinephrine reuptake inhibitor
used in many things such as neuropathic pain, anxiety, depression, osteoarthritis and stress
overdose seizure, tachycardia, emesis, coma, syncope
Venlafaxine
serotonin and norepinephrine reuptake inhibitor
used in many things such as neuropathic pain, anxiety, depression, vasomotor symptoms associated with menopause, OCD
overdose seizure, tachycardia, emesis, coma, syncope
Kinase inhibitor (-nib eg getfitinib/sorafenib)
used to treat cancers
inhibits cell proliferation
can cause diarrhoea and skin rash
Neostigmine
reversible cholinesterase inhibitor (not cross BB) - ie more Aches = more muscle contraction
used to treat myasthenia gravis and reverse effects of muscle relaxants
overdose - cholinergic crisis, weak respiration muscle = death
Edrophonium
short acting cholinesterase inhibitor (longer presence of ACh) used in cardiac arrhythmia and myasthenia gravis
also used as antidote to curare poisoning
can cause sweating, bradycardia, nausea, increased saliva
Apixibam
factor Xa inhibitor - prevent formation of thrombus
reduce risk of stroke and systemic embolism with A fib , reduce risk of DVT
Primaquine
used to treat malarias and other plasmodium diseases
Amiodarone
class 3 antiarrythmic drug such as for V fib and V tachy blocks K currents increasing repolarisation time in the heart - increase AP time
overdose can cause arrhythmia, AV block and liver toxicity
Asparaginase
anti tumour, depletes asparaginase (needed for DNA) = apoptosis of cells
used in the treatment of acute lymphoblastic leukaemia
Sotalol
class 3 antiarrythmic - used in ventricular arrhythmias and A fib/flutter inhibits k channels and B1 adrenoreceptors = slow repolarisation time
overdose - bradycardia, bronchospasm, hypoglycaemia, hypotension
Ateplase (Tissue Plasminogen Activator - TPA)
used for MI, Acute ischaemic stroke and lysis of pulmonary embolism
activates plasmin which degrades fibrin exerting thrombolytic action
Diltiazem
antihypertensive, vasodilator and calcium channel blocker (effects cardiac and vascular muscle)
used in short term management of A fib and lowers blood pressure - anginal pain
overdose can lead to bradycardia, hypotension, lethargy, heart failure
Dabigatran
reversibly binds to thrombin - anticoagulant
used to prevent blood clots and reduce risk of stroke and A fib, pul embolism
can cause bleeding and gastritis
Verapamil
calcium channel blocker (L type)
used for hypertension, arrythmias, and angina mainly (similar to diltiazem)
overdoes = hypotension, bradycardia, arrhythmia, non-cardiogenic pulmonary edema
Salbutamol
short acting selective B2 agonist used in treatment of asthma and COPD (bronchodilator - relax bronchiole smooth muscle)
overdose = angina, dizziness, fatigue, hypokalaemia, tachycardia
Propafenone
antiarrythmia - mainly ventricular
reduces upstroke velocity of phase 0 ie Na influx also prolongs refractory period
overdose - convulsions, hypotension, lethargy
Propranolol
Mainly used to treat hypertension - helps with angina, CHD, A fib, migraine and MI
non-selective B adrenergic antagonist
overdose - hypotension, bronchospasm in asthma patients, bradycardia
Flecanide
Class 1 anti-arrythmic - prevent supraventricular arrhythmias and ventricular arrhythmias and A fib
blocks sodium influx and prolongs refractory period
overdose / toxicity seen by ECG abnormalities, hypotension, bradycardia, death risk
Atenolol
B1 selective antagonist
used in management of hypertension, angina with coronary atherosclerosis, MI risk
can cause bronchoconstriction which is at risk for asthma patients