Not to be confused with hemostasis. Homeostasis or homoeostasis (homeo- + -stasis) is the property of a system in which variables are regulated so that internal conditions remain stable and relatively constant. Examples of homeostasis include the regulation of temperature and the balance between acidity and alkalinity (pH). It is a process that maintains the stability of the human body's internal environment in response to changes in external conditions.
Allergies, also known as allergic diseases, are a number of conditions caused by hypersensitivity of the immune system to something in the environment that usually causes little problem in most people.
URL of this page: //medlineplus.gov/ency/article/000819.htm. Drug allergies are a group of symptoms caused by an allergic reaction to a drug (medicine). A drug allergy involves an immune response in the body that produces an allergic reaction to a medicine. The first time you take the medicine, you may have no problems.