| Cabergoline | Central Nervous System Agents | LC/MS/MS | 1-50 pg/mL | Human EDTA Plasma |
| Cabergoline | Central Nervous System Agents | LC/MS/MS | 50-15000 pg/mL | Rabbit EDTA Plasma |
| Calcitriol | Rheumatology | LC/MS/MS | 5-500 pg/mL | Human EDTA Plasma |
| Candesartan | Cardiovascular | LC/MS/MS | 0.5-250 ng/mL | Human EDTA K2 Plasma |
| Capecitabine; 5-DFCR | Oncology | LC/MS/MS | 10-5000 ng/mL | Human EDTA Plasma |
| Capecitabine; 5-FU | Oncology | LC/MS/MS | 10-5000ng/mL | Human EDTA K2 Plasma |
| Captopril (free) | Cardiovascular | LC/MS/MS | 1-500 ng/mL | Human EDTA Plasma |
| Captopril (total) | Cardiovascular | LC/MS/MS | 2-750 ng/mL | Human EDTA Plasma |
| Carbamazepine | Central Nervous System Agents | LC/MS/MS | 100-5000 ng/mL | Human Plasma |
| Carbamazepine; 10,11-Epoxide Carbamazepine | Central Nervous System Agents | LC/MS | 50-5000 ng/mL ; 10-250 ng/mL | Human EDTA Plasma |
| Carbamazepine; 10,11-Epoxide Carbamazepine | Central Nervous System Agents | LC/MS/MS | 50-5000 ng/mL; 10-250 ng/mL | Human K3 EDTA Plasma |
| Carboplatin | TBD | ICP/MS | 1-100 µg/mL | Human EDTA Plasma |
| Carisoprodol; Meprobamate | Central Nervous System Agents | LC/MS/MS | TBD | Human Plasma |
| Carisoprodol; Meprobamate | Central Nervous System Agents | LC/MS/MS | 10-8000 ng/ml; 10-8000 ng/ml | Human EDTA Plasma |
| Carvedilol; 4'-Hydroxyphenylcarvedilol | Cardiovascular | LC/MS/MS | 0.25-80 ng/mL ; 100-7500 ng/mL | Human EDTA Plasma |
| Cefaclor | Infectious Disease | LC/MS/MS | 50-25000 ng/mL | Human EDTA Plasma |
| Cefadroxil | Infectious Disease | LC/MS/MS | 200-40000 ng/mL | Human EDTA Plasma |
| Cefatrizine | Infectious Disease | HPLC/FLR | 100-1000 ng/mL | Human EDTA K3 Plasma |
| Cefdinir | Infectious Disease | LC/MS/MS | 25-5000 ng/mL | Human EDTA K3 Plasma |
| Cefixime | Infectious Disease | LC/MS/MS | 20-10000 ng/mL | Human EDTA Plasma |
| Cefpodoxime | Infectious Disease | LC/MS/MS | 20-5000 ng/mL | Human EDTA Plasma |
| Cefprozil (Z)-Isomer and Cefprozil (E)-Isomer | Infectious Disease | LC/MS/MS | 100-10000 ng/mL (Z) and 11 - 1110 ng/mL (E) | Human EDTA Plasma |
| Cefuroxime | Infectious Disease | HPLC/UV | 50-25000 ng/mL | Human EDTA Plasma |
| Celecoxib | Pain | LC/MS | 10-2000 ng/mL | Human Lithium Heparinized Plasma |
| Celecoxib | Pain | HPLC/UV | 10-2000 ng/mL | Human EDTA Plasma |
| Cephalexin | Infectious Disease | LC/MS/MS | 50-25000 ng/mL | Human EDTA Plasma |
| Cetirizine | Respiratory | HPLC/UV | 10-400 ng/mL | Human Plasma |
| Cetirizine | Respiratory | LC/MS | 2-200 ng/mL | Human EDTA K3 Plasma |
| Chlormadinone acetate; 3-hydroxy chlormadinone acetate | Endocrinology | LC/MS/MS | 50-5000 pg/mL | Human EDTA Plasma |
| Chlorpheniramine | Respiratory | LC/MS/MS | 0.2-100 ng/mL | Human EDTA Plasma |
| Ciclopirox | Infectious Disease | LC/MS/MS | 20-10000 ng/mL | Mouse EDTA Plasma |
| Ciclopirox | Infectious Disease | LC/MS/MS | 5-5000 pg/mL | Human EDTA Plasma |
| Ciclopirox | Infectious Disease | LC/MS/MS | 1-500 ng/mL | Human urine |
| Ciclopirox | Infectious Disease | LC/MS/MS | 1-100 ng/mL | Rat Plasma |
| Ciclopirox | Infectious Disease | LC/MS/MS | 1-100 ng/mL | Human Urine |
| Ciclopirox-glucuronide | Infectious Disease | LC/MS/MS | 10-5000 ng/mL | Human urine |
| Ciclopirox-glucuronide | Infectious Disease | LC/MS/MS | 2.5-250 ng/mL | Human EDTA K3 Plasma |
| Ciclopirox-glucuronide | Infectious Disease | LC/MS/MS | 1-500 ng/mL | Rabbit EDTA K2 Plasma |
| Ciclopirox-glucuronide | Infectious Disease | LC/MS/MS | 1-500 ng/mL | Rat EDTA K2 Plasma |
| Cilostazol | Cardiovascular | LC/MS/MS | 5-1500 ng/mL | Human EDTA K3 Plasma |
| Cilostazol | Cardiovascular | LC/MS/MS | 5-1500 ng/mL | Human EDTA Plasma |
| Cilostazol;OPC-13213;OPC-13015 | Cardiovascular | LC/MS/MS | 5-1500 ng/mL; 1-100ng/mL ;2-200 ng/mL | Human EDTA Plasma |
| Cinacalcet | Rheumatology | LC/MS/MS | 100-50000 pg/mL | Human Plasma |
| Ciprofibrate | Cardiovascular | LC/MS | 0.25-50 µg/mL | Human Sodium Heparinized Plasma |
| Ciprofibrate | Cardiovascular | LC/MS | 0.25-50 µg/mL | Human EDTA Plasma |
| Ciprofloxacin | Infectious Disease | HPLC/FLR | 20-5000 ng/mL | Human EDTA Plasma |
| Ciprofloxacin | Infectious Disease | HPLC/FL | 20-5000 ng/mL | Human Plasma |
| Cisapride; Norcisapride | Gastrointestinal | LC/MS/MS | 0.5-200 ng/mL | Human EDTA Plasma |
| Citalopram | Central Nervous System Agents | LC/MS/MS | 0.2-100 ng/mL | Human EDTA Plasma |
| Citalopram | Central Nervous System Agents | LC/MS/MS | 0.2-75 ng/mL | Human EDTA Plasma |
| Citalopram | Central Nervous System Agents | LC/MS/MS | 0.2-75 ng/mL | Human K3 EDTA Plasma |
| Cizolirtine; Desmethylcizolirtine | Pain | LC/MS/MS | 1-2000 ng/ml; 1-2000 ng/ml | Human Na Hep plasma |
| Clarithromycin | Infectious Disease | HPLC/MS/MS | 0.1-10 µg/mL | Human Plasma |
| Clarithromycin | Infectious Disease | LC/MS/MS | 20-5000 ng/mL | Human EDTA Plasma |
| Clavulanic Acid | Infectious Disease | LC/MS/MS | 40-4000 ng/mL | Human EDTA Plasma |
| Clindamycin | Infectious Disease | LC/MS/MS | 10-5000 ng/mL | Human EDTA Plasma |
| Clomiphene cis (Z) and trans (E) Isomers | Endocrinology | LC/MS/MS | 100-20000 pg/mL; 50-10000 pg/mL | Human EDTA Plasma |
| Clonazepam | Central Nervous System Agents | LC/MS/MS | 100-50000 ng/mL | Human EDTA Plasma |
| Clonidine | Cardiovascular | LC/MS/MS | 10-400 pg/mL | Human EDTA Plasma |
| Clopidogrel | Cardiovascular | LC/MS/MS | 5-2500 pg/mL | Human EDTA Plasma |
| Clopidogrel | Cardiovascular | LC/MS/MS | 20-10000 pg/ml | Rat EDTA K3 plasma |
| Clopidogrel | Cardiovascular | LC/MS/MS | 5-2500 pg/mL | Human Sodium Heparin Plasma |
| Clopidogrel Carboxylic Acid | Cardiovascular | LC/MS/MS | 15-7500 ng/mL | Rat EDTA Plasma |
| Clopidogrel Carboxylic Acid | Cardiovascular | LC/MS/MS | 4-4000 ng/mL | Human EDTA Plasma |
| Clotrimazole | Infectious Disease | LC/MS/MS | 1-100 ng/mL | Human Plasma |
| Clotrimazole | Infectious Disease | LC/MS/MS | 0.1-20 ug/mL | Human Saliva |
| Clozapine | Central Nervous System Agents | LC/MS/MS | 2-1000 ng/mL | Human EDTA Plasma |
| Clozapine; N-Desmethylclozapine | Central Nervous System Agents | LC/MS/MS | 2-1000 ng/mL; 1-500 ng/mL | Human EDTA Plasma |
| Cocaine;Benzoylecgonine | Miscellaneous | LC/MS/MS | 5-500 ng/mL;10-1000 ng/mL | Human EDTA Plasma |
| Codeine | Pain | LC/MS/MS | 0.5-100 ng/mL | Human EDTA K3 Plasma |
| Codeine, Norcodeine and Codeine-6-Glucuronide | Pain | LC/MS/MS | 0.5-100 ng/mL, 2-400 ng/mL, 2-400 ng/mL | Human EDTA K3 Plasma |
| Colchicine | Rheumatology | LC/MS/MS | 40-10000 pg/mL | Human EDTA K3 Plasma |
| Cortisol | Endocrinology | RIA | 5-200 ng/mL | Human Serum |
| Cortisol | Endocrinology | LC/MS/MS | 2-800 ng/mL | Human EDTA Plasma |
| Cortisol | Endocrinology | LC/MS/MS | 2-800 ng/mL | Human EDTA Plasma |
| Cyclosporin A | Immunology | LC/MS/MS | 2-1000 ng/mL | Human EDTA Whole Blood |
| Cyproterone Acetate | Endocrinology | LC/MS/MS | 100-40000 pg/mL | Human EDTA Plasma |
| Cytarabine and ARA-U | Oncology | LC/MS/MS | 1-100 µg/mL and 100-10000 ng/mL | Rat EDTA Plasma |