INDIRECT COOMBS TEST ( ICT )

The indirect Coombs (ICT) test detects circulating antibodies against red blood cells (RBCs). A positive ICT my suggest:
Erythroblastosis fetails hemolytic disease.
Incompatible blood match (when used in blood blanks).
Autoimmune or drug-induced hemolytic anemia.

Interfering Factors:

Drugs that may cause false-positive results include antiarrhythmics, antituberculins, cephalosporins, chlorpromazine (Thorazine), insulin, levodopa, methyldopa (Aldomet), penicillins, phenytoin (Dilantin), quinidine, sulfonamides, and tetracyclines.