The leaflets in this section are authored by an experienced pharmacist. Pharmacists are experts in medicines. The medicines in this section include those used for treating problems with breathing such as asthma, hay fever and COPD. If you've ever thought "Who shouldn't take montelukast?", "How do I use my salbutamol inhaler?", "How do I get the most from my tiotropium treatment?" or "What problems can theophylline cause?" information leaflets in this section will have answers for you.