Lupus anticoagulant (also known as lupus antibody, LA, LAC, or lupus inhibitors) is an immunoglobulin that binds to phospholipids and proteins associated with the cell membrane.Lupus anticoagulant is a misnomer, as it is actually a prothrombotic agent.Lupus anticoagulant antibodies in living systems cause an increase in inappropriate blood clotting. The name derives from their properties in vitro, since in laboratory tests, these antibodies increase aPTT.upus anticoagulant is a misnomer, as it is actually a prothrombotic agent. Lupus anticoagulant antibodies in living systems cause an increase in inappropriate blood clotting. The name derives from their properties in vitro, since in laboratory tests, these antibodies increase aPTT.
Medical Definition of tachyphylaxis. plural. tachyphylaxes. \-ËsÄz\play. : diminished response to later increments in a sequence of applications of a physiologically active substance (as the diminished pressor response that follows repeated injections of renin)
Anaphylaxis can also be called anaphylactic shock. It is an allergic reaction that can be life-threatening. In most cases, anaphylaxis will mean you need to take a trip to the emergency room. Click through the slideshow to find out about the causes of anaphylaxis.You'll also learn how to spot signs of anaphylactic shock and tips on how to treat and manage anaphylaxis.any happen with all allergic reactions. An anaphylactic reaction is different, though. That's because a number of symptoms can appear all at once. Symptoms may include: 1  itchy skin or hives. 2  a runny nose or sneezing. 3  an itchy mouth, throat, trouble swallowing, or swollen lips and tongue. 4  swollen limbs. 5  coughing.