<prompt> An anti-hypeensive drug that causes positive coomb;s test isMethyldopaClonidineHydralazineSodium-nitropruside  <response>: Alpha-methyldopa causes autoimmune hemolytic anemia Coombs test detects antibodies against foreign red blood cells. REF. ESSENTIALS OF MEDICAL PHARMACOLOGY K.D TRIPATHI-6th edition. Page No-547 