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.
HIV Medications. Several different classes of medications for HIV are available. These classes are divided into seven different groups and include NRTIs, NNRTIs, NtRTIs, protease inhibitors, entry inhibitors, integrase inhibitors, and combination medications. In most cases, people with HIV or AIDS use medications from several of these classes.