Pharmacology Flashcards
Metformin mechanism
Works by redicing hepatic glucose output and increasing glucose uptake by skeletal muscles by activating adenosine monophosphate
Metformin adverse effects and contraindications
Adverse effects: GI upset
Containdications: use cautiously in renal and liver impairment, withhold before and for 48 hrs after use of IV contrast medium
Ramipril mechanism
ACE inhibitor - work by blocking ACE, so reduces angiotensin II peripheral vascular resistance, so reduces aldosterone secretion
Atenolol mechanism
Beta blocker - work by reducing force of cardiac muscle contraction and speed of conduction to reduce oxygen demand. Also prolong the refractory period of the AV node so slow ventricular rate in AF
Dobutamine indications
Indications: cardiogenic shock, severe heart failure, cardiomyopathies, septic shock
Ramipril contraindications and adverse effects
Adverse effects: cough, rash (due to bradykinin), hypotension, acute pre renal failure, hyperkalaemia
Contraindications: in pregnancy (sometimes), with diabetes medication, with other potassium elevating drugs (spiralactone), renal impairment
Atenolol adverse effects and contraindications
Adverse effects: fatigue, headache, bradycardia, hypotension, cold peripheries
Contraindications: asthma, Raynaud’s, with non dihydropyridine CCBs e.g. verapamil
Dobutamine adverse effects
Adverse effects: arrythmias, bronhcospasm, dyspnoea, headache
Amlodipine mechanism
Dihydropyridine CCB (more selective to vasculature - work by decreasing calcium ion entry to vascular cells causing relaxation and vasodilation of arterial smooth muscle
Amlodipine adverse effects
Ankle swelling, flushing, headaches, palpitations
Verapamil mechanism
Non - dihydropyridine CCB (more selective to heart)- work by supressing cardiac conduction across AV node so slow rate and reduce oxygen demand
Verapamil adverse effects and contraindications
Adverse effects: constipation, bradycardia, heart block, heart failure
Contraindications: should not be prescribed with B blockers except under specialist supervision
Losartan indications
Indications: Hypertension (when ACEis not tolerated), chronic heart disease, ishcaemic heart disease, diabetic neuropathy, CKD
Losartan adverse effects and contraindications
Hypotension, hyperkalaemia, renal failure
Contraindicated in pregnancy and breastfeeding, AKI
Dalteparin indications
Prevention of DVT/ PE in hospitalised patients, ACS
Dalteparin adverse effects and contraindications
Adverse effects: haemorrhage risk, brusing at injection site
Use cautiously in patients with clotting disorders, recent surgery
Rivaroxaban indications
Indications: treatment and prevention of reoccurance of venous thromboembolism
Rivaroxaban adverse effects and contraindications
Adverse effects: bleeding and haemorrhage risk, anaemia, dizziness
Contraindications: pregnancy and breast feeding, risk of major bleed
Loperamide mechanism
Is an antimotility - work by slowing bowel content so more water is absorbed. Is an opioid agonist receptor but can’t penetrate CNS so no analgesic effects
(others: codeine phosphate - can penetrate CNS so has analgesic effects)
Loperamide adverse effects
Constipation, abdo cramps, flatulence
Lansoprazole indications
Prevention and treatment of peptic ulcer disease, symptomatic relief in dyspepsia and GORD
Ranitidine indications
H2 receptor antagonist - treatment and prevention of gastric and duodenal ulcers, symptomatic relief of GORD and dyspepsia
Sulfasalazine indications
Mild/ moderate ulcerative colitis
Methotrexate indications
Indications: rheumatoid arthritis, psoratic arthritis, SLE, spondyloarthropathies