Avoid β-adrenoceptor antagonists in asthma, bradycardia, heart block and heart failure. Avoid prostaglandin analogues in pregnancy and asthma. Avoid α2-adrenoceptor agonists in severe cardiovascular...

Avoid β-adrenoceptor antagonists in asthma, bradycardia, heart block and heart failure. Avoid prostaglandin analogues in pregnancy and asthma. Avoid α2-adrenoceptor agonists in severe cardiovascular disease. Avoid carbonic anhydrase inhibitors in pregnancy; they can cause hypokalaemia and electrolyte imbalance. Avoid muscarinic receptor agonists in conjunctival or corneal damage, cardiac disease and asthma.