asthma Flashcards
Therapeutic use Salbutamol (short-acting)
reliever during acute asthma attacks
Mechanism of action Salbutamol (short-acting)
mast cell membrane stabilisation and direct bronchodilation are a result of the stimulation ofB2 receptors on smooth muscles in the airways
Adverse effects Salbutamol (short-acting)
skeletal muscle tremor
irritability
anxiety
Contraindications Salbutamol (short-acting)
hyperthyroidism
hypertension
Drug interaction Salbutamol (short-acting)
corticosteroids
Therapeutic use Salmeterol (long-acting)
symptom controller in exercise induced asthma
Mechanism of action Salmeterol (long-acting)
activation of B2-receptors leading to bronchodilation
Adverse effects Salmeterol (long-acting)
headache
tachycardia
restlessness
Contraindications Salmeterol (long-acting)
deteriorating COPD
acute bronchospasm
Drug interaction Salmeterol (long-acting)
monoamine oxidase inhibitors
Therapeutic use Theophylline
asthma (bronchodilator)
Mechanism of action Theophylline
the blocking of phosphodiesterase causes a raise in intracellular levels of cAMP and this leads to smooth muscle relaxation.
Adverse effects Theophylline
nervousness
nausea
anxiety
Contraindications Theophylline
liver impairment
children under 2 years of age
Drug interaction Theophylline
macrolide antibiotics
Therapeutic use Ipratropium
chronic asthma
Mechanism of action Ipratropium
blocking the cholinergic bronchomotor tone causes bronchodilation.
bronchoconstriction is prevented due to inhibition of vagal reflexes.
Adverse effects Ipratropium
dizziness
nausea
throat irritation
Contraindications Ipratropium
constipation
atropine sensitivity
Drug interaction Ipratropium
amantadine
Therapeutic use Sodium cromoglycate
chronic asthma in children
Mechanism of action Sodium cromoglycate
inhibition of chloride channels causing a stabilisation of eosinophils and mast cells that have been sensitised.
therefore, altering the membranes’ electrical gradient, which blocks the inflow of calcium ions.
Hence the inhibition of bronchconstriction mediators by sodium cromoglicate and the blockage of parasympathetic reflexes in the smooth muscle tissue of the airways.
Adverse effects Sodium cromoglycate
respiratory tract infection
dry mouth
unpleasant taste
Contraindications Sodium cromoglycate
acute asthma attack
acute bronchospasm
Drug interaction Sodium cromoglycate
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Therapeutic use Zafirlukast
asthma
Mechanism of action Zafirlukast
leukotriene receptor antagonist
Adverse effects Zafirlukast
fever
insomnia
rashes
Contraindications Zafirlukast
acute asthma attacks
cirrhosis
Drug interaction Zafirlukast
Warfarin