Test Overview
Clinical Utility
Evaluation of suspected insulinoma characterized by hypoglycemia and increased serum insulin concentration.
Detecting drugs that stimulate insulin secretion.
Drugs detected by this procedure are:
- The first-generation sulfonylureas: chlorpropamide (Diabinese), tolazamide, and tolbutamide (Orinase)
- The second-generation sulfonylureas: glimepiride (Amaryl), glipizide (Glucotrol), and glyburide (Glibenclamide)
- The meglitinides: repaglinide (Prandin) and nateglinide (Starlix)
- The thiazolidinediones: pioglitazone (Actos) and rosiglitazone (Avandia)
This test is not intended for therapeutic drug monitoring but could be used to monitor compliance.
Method
Liquid chromatography-tandem mass spectrometry (LC-MS/MS)
Result Included
Chlorpropamide; Glimepiride; Glipizide; Glyburide; Nateglinide; Pioglitazone; Repaglinide; Rosiglitazone; Tolazamide; Tolbutamide
Aliases/Synonyms
Amaryl; Chlorpropamide; Dymelor; Glimepiride; Glipizide; Glucotrol; Glyburide; Meglitinides; Micronase; Prandin; Repaglinide; Sulfonylurea Hypoglycemic Serum; Sulfonylureas; Tolazamide; Tolinase; Acetohexamide; Dymelor; Orinase; Tolbutamide; Diabinese; Chlorpropamide; HYPOG; Diabinese; Actoplus Met; Actos; Avandamet; Glibenclamide; Glubrava; Glucophage; Lobeglitazone; Meglitinide; Nateglinide; Novonorm; Orinase; Pioglitazone; Piomet; Politor; PPAR; Rosiglitazone; Starlix; Surepost; Thiazolidinedione; Tolazamide; Tolbutamide; Tolinase; Troglitazone; Hypoglycemic Agents
Specimen
Specimen Type
SerumContainers
Collection Containers
Red top (no additive)
Volume
Sample Volume
1.5 mL
Minimum Volume
0.5 mL
Patient Preparation
Specimen must be collected during an episode of hypoglycemia.
Stability
| Ambient | Refrigerated | Frozen |
|---|---|---|
| 7 days | 28 days | 28 days |
Rejection Criteria
| Criteria | Specification |
|---|---|
| Specimen | Gel-separator tubes |
Performance & Interpretation
Turnaround Time
8 days
Results
-
ChlorpropamideNegative
Comment
Screening cutoff concentration: 100 ng/mL
-
GlimepirideNegative
Comment
Screening cutoff concentration: 20 ng/mL
-
GlipizideNegative
Comment
Screening cutoff concentration: 5 ng/mL
-
GlyburideNegative
Comment
Screening cutoff concentration: 5 ng/mL
-
NateglinideNegative
Comment
Screening cutoff concentration: 5 ng/mL
-
PioglitazoneNegative
Comment
Screening cutoff concentration: 20 ng/mL
-
RepaglinideNegative
Comment
Screening cutoff concentration: 5 ng/mL
-
RosiglitazoneNegative
Comment
Screening cutoff concentration: 20 ng/mL
-
TolazamideNegative
Comment
Screening cutoff concentration: 50 ng/mL
-
TolbutamideNegative
Comment
Screening cutoff concentration: 20 ng/mL
Referral Location
Out-of-Country
Interface & Setup
HL7 Interface Codes
| Order Code | Result Name | Result Codes | Units |
|---|---|---|---|
| HGCAS | Tolbutamide | 62021 | ng/mL |
| Tolazamide | 62020 | ng/mL | |
| Repaglinide | 62025 | ng/mL | |
| Pioglitazone | 64293 | ng/mL | |
| Nateglinide | 64292 | ng/mL | |
| Glyburide | 62024 | ng/mL | |
| Glipizide | 62023 | ng/mL | |
| Glimepiride | 62022 | ng/mL | |
| Chlorpropamide | 62019 | ng/mL | |
| Acetohexamide | 62018 | ng/mL | |
| Rosiglitazone | 64294 | ng/mL |
Test Version
Last Updated
2025-11-17