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 is a rare, life-threatening allergic reaction that causes the widespread dysfunction of body systems. Signs and symptoms of anaphylaxis include: 1  Tightening of the airways and throat, causing trouble breathing. 2  Nausea or abdominal cramps.  Vomiting or diarrhea.