Anesthesia local

         Local or regional anesthesia involves the injection or application of an anesthetic drug to a specific area of the body, as opposed to the entire body and brain as occurs during general anesthesia.

Anesthesia, general

     General anesthesia is the induction of a state of unconsciousness with the absence of pain sensation over the entire body, through the administration of anesthetic drugs. It is used during certain medical and surgical procedures.

Anemias

     Anemia is a condition characterized by abnormally low levels of healthy red blood cells or hemoglobin (the component of red blood cells that delivers oxygen to tissues throughout the body).

Anaphylaxis

      Anaphylaxis is a rapidly progressing, life-threat­ening allergic reaction. Anaphylaxis is a type of allergic reaction, in which the immune system responds to otherwise harmless substances from the environment. Unlike other al­lergic reactions, however, anaphylaxis can kill. Reaction may begin within minutes or even seconds of exposure, and rapidly progress to cause airway constriction, skin and intestinal ir­ritation, and altered heart rhythms. In severe cases, it can result in complete airway obstruction, shock, and death.

Analgesics, opioid

     Opioid analgesics, also known as narcotic analgesics, are pain relievers that act on the central nervous system. Like all narcotics, they may become habit-forming if used over long periods.

Analgesics

  Analgesics are medicines that relieve pain.

Anal warts

         Anal warts, also known as condyloma acuminata, are small warts that can occur in the rectum. Initially appear as tiny blemishes that can be as small as the head of a pin or grow into larger cauliflowerlike protuberances. They can be yellow, pink, or light brown in color, and only rarely are painful or uncomfortable. In fact, infected individuals often are unaware that they exist. Most cases are caused by sexual transmission. Most individuals have between one to 10 genital warts that range in size from roughly 0.5-1.9 cm2. Some will complain of painless bumps or itching, but often, these warts can remain completely unnoticed.