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.
What is fluorouracil used for? 5-Fluorouracil is most often prescribed for actinic keratoses and Bowen disease (in situ squamous cell carcinoma). It destroys sun-damaged skin cells so the skin appears smoother and more youthful. It works best on face and scalp, and is less effective on other areas.