| 2292U |
n-Hexane Exposure Monitoring, Urine |
| 3060U |
N,N-Dimethylacetamide Exposure (N-Methylacetamide), Urine |
| 3070U |
N,N-Dimethylformamide (DMF) Exposure (N-Monomethylformamide), Urine |
| 3103B |
Nadolol, Blood |
| 3103SP |
Nadolol, Serum/Plasma |
| 3103U |
Nadolol, Urine |
| 3107B |
Nabumetone as Metabolite, Blood |
| 3107SP |
Nabumetone as Metabolite, Serum/Plasma |
| 3107U |
Nabumetone as Metabolite, Urine |
| 3110B |
Nalbuphine - Free (Unconjugated), Blood |
| 3110SP |
Nalbuphine - Free (Unconjugated), Serum/Plasma |
| 3110U |
Nalbuphine - Total (Conjugated/Unconjugated), Urine |
| 3111B |
Naloxone - Free (Unconjugated), Blood |
| 3111SP |
Naloxone - Free (Unconjugated), Serum/Plasma |
| 3111U |
Naloxone - Total (Conjugated/Unconjugated), Urine |
| 3113U |
Naloxone - Total (Conjugated/Unconjugated) Screen, Urine |
| 3116B |
Naltrexone and Metabolite - Free (Unconjugated), Blood |
| 3116SP |
Naltrexone and Metabolite - Free (Unconjugated), Serum/Plasma |
| 3116U |
Naltrexone and Metabolite - Total (Conjugated/Unconjugated), Urine |
| 3118B |
Nateglinide, Blood |
| 3118SP |
Nateglinide, Serum/Plasma |
| 3130B |
Naproxen, Blood |
| 3130FL |
Naproxen, Fluid |
| 3130SP |
Naproxen, Serum/Plasma |
| 3130U |
Naproxen, Urine |
| 3140B |
Nickel, Blood |
| 3140FL |
Nickel, Fluid |
| 3140H |
Nickel, Hair |
| 3140N |
Nickel, Nails |
| 3140R |
Nickel, RBCs |
| 3140SP |
Nickel, Serum/Plasma |
| 3140TI |
Nickel, Tissue |
| 3140U |
Nickel, Urine |
| 3145B |
Nefazodone, Blood |
| 3145SP |
Nefazodone, Serum/Plasma |
| 3145U |
Nefazodone, Urine |
| 3150B |
Nicotine and Metabolite, Blood |
| 3150FL |
Nicotine and Metabolite, Fluid |
| 3150SP |
Nicotine and Metabolite, Serum/Plasma |
| 3150TI |
Nicotine and Metabolite, Tissue |
| 3150U |
Nicotine and Metabolite with Anabasine, Urine |
| 3158B |
Nifedipine, Blood |
| 3158SP |
Nifedipine, Serum/Plasma |
| 3175B |
Nitrazepam and Metabolite, Blood |
| 3175SP |
Nitrazepam and Metabolite, Serum/Plasma |
| 3175U |
Nitrazepam and Metabolite, Urine |
| 3214B |
Nitrous Oxide, Blood |
| 3214TI |
Nitrous Oxide, Tissue |
| 3216B |
Nordiazepam and Metabolite, Blood |
| 3216SP |
Nordiazepam and Metabolite, Serum/Plasma |
| 3216U |
Nordiazepam and Metabolite, Urine |
| 3220B |
Nortriptyline, Blood |
| 3220SP |
Nortriptyline, Serum/Plasma |
| 3220TI |
Nortriptyline, Tissue |
| 3220U |
Nortriptyline, Urine |
| 3223SP |
Nonsteroidal Anti-Inflammatory Drug Panel, Serum/Plasma |
| 3224B |
NPS Stimulants (Qualitative), Blood |
| 3224SP |
NPS Stimulants (Qualitative), Serum/Plasma |
| 3224U |
NPS Stimulants (Qualitative), Urine |
| 3225SP |
Nuedexta®, Serum/Plasma |
| 8702B |
Nortriptyline, Blood |
| 8702U |
Nortriptyline, Urine |
| 8756B |
Novel Psychoactive Substances (NPS) Screen 1, Blood |
| 8756SP |
Novel Psychoactive Substances (NPS) Screen 1, Serum/Plasma |
| 8756U |
Novel Psychoactive Substances (NPS) Screen 1, Urine |
| 9215B |
Nitrazepam and Metabolite Screen, Blood |
| 9215SP |
Nitrazepam and Metabolite Screen, Serum/Plasma |
| 9404B |
Nicotine and Metabolite Screen, Blood |
| 9404SP |
Nicotine and Metabolite Screen, Serum/Plasma |
| 9404U |
Nicotine and Metabolite with Anabasine Screen, Urine |
| 9433B |
Nortriptyline Screen, Blood |
| 9433U |
Nortriptyline Screen, Urine |