Diagnostic kits comprised of medical diagnostic chemical reagents for testing of body fluids and body tissue via high pressure liquid chromatography, for use in detecting immunosuppressant, anticoagulant, infectious, parasitic, metabolic, endocrine, musculoskeletal, cardiovascular, cardiopulmonary, genitourinary, sexual dysfunction, oncological, hepatological, ophthalmic, respiratory, neurological, gastrointestinal, hormonal, dermatological, psychiatric, immune system and nervous system relat...