Drug Testing lab tests in Walk-In Lab Lab Test Test Cost Valproic Acid Serum Test - Valproic Acid Test $78.00 Phenytoin (Dilantin) Blood Test $68.00 Trileptal (Oxcarbazepine) Serum Test $200.00 Valproic Acid Serum Test $78.00 Lithium Serum Test - Lithium Blood Test $38.00 Amiodarone Blood Test $98.00 Methadone Blood Test $249.00 Digoxin Blood Test $68.00 Cholinesterase Blood Test $128.00 Methadone Blood Test $249.00 Valproic Acid Blood Test, Free $155.00 Nicotine and Metabolite Urine Test, Quantitative, Random $149.00 Sodium Urine Test, 24-Hour $48.00 Cholinesterase, RBC and Plasma Test $138.00 Nortriptyline Serum Test $189.00 Carbamazepine (Tegretol) Serum Test $48.00 Cholinesterase Blood Test $79.00 Theophylline Blood Test $95.00 Nortriptyline Serum Test $189.00 Lithium Serum Test $44.00 Phenobarbital Serum Test $67.00 Carbohydrate-deficient Transferrin (CDT) Blood Test $108.00 Phenytoin (Dilantin) Blood Test $63.00 Digoxin Blood Test $71.00 Carbamazepine (Tegretol) Serum Test $69.00 Nicotine and Expanded Metabolites Blood Test, LC/MS/MS $78.00 Beta-Hydroxybutyrate Blood Test $78.00 Sodium Urine Test, 24-Hour $38.00 Tetanus Titer Blood Test $71.00