Elemental potassium is a soft silvery-white alkali metal that oxidizes rapidly in air and reacts vigorously with water, generating sufficient heat to ignite hydrogen emitted in the reaction and burning with a lilac flame.
An antianginal is any drug used in the treatment of angina pectoris, a symptom of ischaemic heart disease.
Medications that can improve angina symptoms include: 1  Aspirin. 2  Aspirin reduces the ability of your blood to clot, making it easier for blood to flow through narrowed heart arteries. 3  Preventing blood clotting may reduce your risk of a heart attack. 4  Nitrates.