Normal extinction of species that occurs as a result of changes in local environmental conditions.
Verapamil Uses: An Overview. 1  High blood pressure (hypertension). 2  Chest pain (angina), including: 3  Vasospastic angina (Prinzmetal's angina or variant angina). 4  Unstable angina. 5  Chronic stable angina (exertional angina). 6  Certain irregular heart rhythms (arrhythmias), including: 7  Chronic atrial flutter.
Today, Plaquenil and other antimalarials are also used to treat and help prevent symptoms caused by certain autoimmune diseases such as rheumatoid arthritis (RA), systemic lupus erythematosus, and discoid lupus, even though these diseases are not caused by malaria parasites.