Cardiology Drugs Flashcards
Loop Diuretic Examples
Furosemide, Bumetanide, Torsemide
How do Loop Diuretics work?
Act on ascending limp to inhibit Na+/K+/2CL- co-transporter
Loop Diuretic Indications
Acute Pulmonary Oedema, Heart Failure, Fluid overload due to other causes
Loop Diuretic Contra-indications
Hypovolaemia, Dehydration, Hypokalaemia/Hyponatraemia
What disease can Loop Diuretics worsen and why?
Gout - Loop Diuretics inhibit uric acid excretion
Loop Diuretic Side Effects
Dehydration, Hypotension, Hearing loss/Tinnitus
What drugs levels are increased by Loop Diuretics?
Lithium, Digoxin, Aminoglycosides
should be careful of this in all diuretics
Thiazide Diuretic Examples
Chlorthiazide, Indapamide, Metolazone
How do Thiazide Diuretics Work?
Inhibit the Na+/CL- co-transported in the Distal Tubule
Thiazide Diuretic Indications
Hypertension, First line if CCBs aren’t tolerated, Third line if ACE + CCB doesn’t work
Thiazide Diuretic Contra-indications
Hypokalaemia, Hyponatraemia, Gout
What drug class reduces the effectiveness of Thiazide Diuretics?
NSAIDs
Potassium Sparing Diuretics Examples
Spironolactone, Amiloride, Eplerenone
Potassium Sparing Diuretics Indications
Combination therapy with Loop/Thiazide diuretics to reduce potassium loss
Potassium Sparing Diuretics Contra-indications
Renal impairment, Hyperkalaemia and Hypokalaemia (unpredictable)
Beta-Blocker Examples
Bisoprolol, Atenolol, Propranolol
How do Beta-Blockers Work?
Block Beta1-adrenoreceptors (in heart) = reduced contraction and speed of conduction in heart
Beta-Blockers Indication
Angina/ACS, Heart failure, AF, SVT
Beta-Blockers Contra-indications
Asthma (bronchospasm), Heart block
Beta-Blockers Side-Effects
Fatigue, Cold Extremities, Sleep disturbance, Impotence
Beta-Blocker Interactions
Don’t use with non-dihydropyridine calcium channel blockers = heart failure / asystole
Non-dihydropyridine Calcium Channel Blocker Examples
Diltiazem, Verapamil
heart
Dihydropyridine Calcium Channel Blocker Examples
Amlodipine, Nifedipine
vasculature
How do Calcium Channel Blockers Work?
Decrease Ca2+ entry into cells = Relaxation, Vasodilation, Reduced contractility
Calcium Channel Blockers Indications
Hypertension, Stable Angina
Calcium Channel Blockers Contra-Indications
Heart failure, AV delay
Calcium Channel Blockers Side Effects
Ankle Swelling, Flushing, Palpitations, Bradycardia
What drugs shouldn’t you prescribe Non-dihydropyridine Calcium Channel Blockers with?
Beta-blockers
ACE Inhibitor Examples
Ramipril, Fosinopril, Enalapril
How do ACE Inhibitors Work?
Block conversion of angiotensin I to angiotensin II (which is a vasoconstrictor)
ACE Inhibitors Indications
Hypertension, Heart Failure, Angina/ACS, CKD
ACE Inhibitor Contra-Indications
Renal artery stenosis, AKI, Pregnancy
ACE Inhibitor Side Effects
Dry Cough, Hypotension (after first dose)
ACE Inhibitor Interactions
Potassium-Elevating drugs, NSAIDs (renal failure)
Angiotensin Receptor Blockers Examples
Losartan, Candesartan
Angiotensin Receptor Blockers Indications
Used as an alternative to ACE inhibitors
same contra-indications and side-effects
How do Nitrates work?
Converted to NO = Reduced Ca2+ in vascular smooth muscle cells
Nitrate Indications
Acute angina/ACS Pain, Prophylaxis of angina (long acting)
Nitrate Contra-indications
Aortic stenosis (=collapse), Hypotension
Nitrate Side Effects
Flushing, Headache, Hyoptension
How does Digoxin Work?
Negatively chronotropic + Positively inotropic
Digoxin Indications
AF, Heart Failure
Digoxin Contra-Indications
Heart block, Ventricular Arrhythmia, Renal failure
Digoxin Side Effects
Visual disturbance, Dizziness, Bradycardia
How does Amiodarone work?
Blocks sodium/calcium/potassium channels and Antagonism of a and b-adrenergic receptors
Amiodarone Indications
Wide Range of Arrhythmias
Why do you have to be careful with Amiodarone?
Many serious side-effects and possible interactions
Anti-Platelet Examples
Aspirin, Clopidogrel, Ticagrelor
How does Aspirin work?
Blocks COX = Reduces thromboxane
Anti-Platelet Indications
ACS, Ischaemic stroke, Long term CVD/PVD
Why shouldn’t aspirin be given to under 16yrs olds?
Reye’s Syndrome (liver and brain)
Aspirin Contra-indications
Under 16yrs, Pregnancy, Peptic ulcer, Gout
Main side-effect of Anti-platelets?
Increased risk of bleeding (especially when combined)
Thrombolytic Examples
Streptokinae, tPA, Alteplase
How do Thrombolytics work?
Catalyse the conversion of plasminogen to plasmin = Dissolves clot
Thrombolytics Indications
Ischaemic stroke, STEMI, Massive PE
Thrombolytics Side Effects
Hypotension, Cardiogenic shock, Serious Bleeding, Arrhythmia
How does Heparin Work?
Inhibits Thrombin and Factor Xa = Prevents clots
What does Low Molecular Weight Heparin specifically work on?
Factor Xa
Name a synthetic compound that is similar to Heparin?
Fondaparinux
Heparin Indications
DVT, PE, ACS
Heparin Side Effects
Bleeding, Heparin-Induced Thrombocytopenia
Oral Anticoagulant Examples
Warfarin, Dabigatran, Rivaroxaban, Apixaban
How does Warfarin work?
Inhibit Vitamin K cofactors: Factors II, VII, IX, X + Protein C, S, Z
How do DOACs/NOACs work?
Inhibit just one Vitamin K cofactor unlike warfarin
Oral Anticoagulants Indications
DVT, PE, AF, Valve replacements
Oral Anticoagulant Contra-indications
Patients at risk of Bleeding, Pregnancy
What system is Warfarin metabolised by?
CYP450 (many interactions)
Why do Antibiotics increase anticoagulation with Warfarin?
They kill gut flora which normally make Vitamin K
What is the main difference between Warfarin and NOACs?
NOACs are less influenced by diet and other medications
Oral Direct Thrombin Inhibitor NOAC Example
Dabigatran
Oral Direct Factor Xa Inhibitor NOAC Example
Rivaroxaban, Apixaban
Statin Examples
Atorvastatin, Simvastatin, Lovastatin
How do Statins Work?
Inhibit HMG Coa Reductase = Decreased cholesterol
Also increase LDL clearance from blood
Statins Indications
Prevention of CVD, Hyperlipidaemia
Statins Contra-indications
Hepatic or Renal impairment, Pregnancy
What is the main Side Effect of Statins?
Muscle aches (can rarely = rhabdomyolisis)
What system are Statins metabolised by?
CYP450