The leaflets in this section are authored by an experienced pharmacist. Pharmacists are experts in medicines. The medicines in this section include those that act on blood or parts of the blood, some vitamins or minerals that are vital for red blood cell production (such as iron and folic acid) and on the body's ability to make a blood clot. If you've ever thought "Who shouldn't take calcium supplements?", "How do I take my desmopressin?", "How do I get the most from my iron treatment?" or "What problems can tranexamic acid cause?" information leaflets in this section will have answers for you.