Healgen® Accurate Oral Fluid Drug Test COT/THC; Healgen® Accurate Oral Fluid Drug Test

K252523 · Healgen Scientific,, LLC · NFW · Feb 12, 2026 · Clinical Toxicology

Device Facts

• Record ID: K252523
• Device Name: Healgen® Accurate Oral Fluid Drug Test COT/THC; Healgen® Accurate Oral Fluid Drug Test
• Applicant: Healgen Scientific,, LLC
• Product Code: NFW · Clinical Toxicology
• Decision Date: Feb 12, 2026
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 862.3870
• Device Class: Class 2

Indications for Use

The Healgen® Accurate Oral Fluid Drug Test COT/THC is a lateral flow chromatographic immunoassay for the qualitative detection of cotinine (COT) and/or marijuana (THC) in oral fluid at the following cut-off concentrations: Test: Cotinine (COT), Calibrator: (-) Cotinine, Cut-off (ng/mL): 30; Test: Marijuana (THC), Calibrator: Delta-9-Tetrahydrocannabinol, Cut-off (ng/mL): 40. This test provides only a preliminary result. An alternative laboratory test must be used to confirm the results provided by this drug test. Liquid chromatography mass spectrometry (LC/MS) is the preferred method for the confirmation test. The Healgen® Accurate Oral Fluid Drug Test is a competitive binding lateral flow immunochromatographic assay for the qualitative and simultaneous detection of Marijuana (THC) and Cotinine in human oral fluid at the cutoff concentrations listed below and their metabolites: Test: Cotinine (COT), Calibrator: (-) Cotinine, Cut-off (ng/mL): 30; Test: Marijuana (THC), Calibrator: Delta-9-Tetrahydrocannabinol, Cut-off (ng/mL): 40. This assay provides only a preliminary analytical test result. A more specific alternate chemical method must be used in order to obtain a confirmed analytical result. Gas chromatography mass spectrometry (GC/MS) and liquid chromatography mass spectrometry (LC/MS) are the preferred confirmatory methods.

Device Story

Lateral flow chromatographic immunoassay; competitive binding principle. Oral fluid sample migrates via capillary action; drug in sample competes with drug-protein conjugate for antibody binding sites. Absence of colored line at test region indicates presence of drug above cut-off; presence of colored line indicates drug absence or concentration below cut-off. Control line confirms proper wicking. Used by lay-users in home or point-of-care settings. Provides preliminary qualitative results; requires laboratory confirmation via LC/MS or GC/MS for clinical decision-making. Benefits include rapid, accessible initial screening for cotinine and marijuana.

Clinical Evidence

No clinical studies performed. Evidence consists of lay-user performance studies (n=160 for initial study, n=98 for THC-specific study) comparing device results to LC/MS reference method. Results showed high agreement across various concentrations relative to cut-offs. Flesch-Kincaid analysis confirmed 7th-grade reading level for instructions.

Technological Characteristics

Lateral flow immunochromatographic assay; competitive binding. Qualitative detection of cotinine (30 ng/mL) and THC (40 ng/mL). Manual test format; no energy source required. Standalone device.

Indications for Use

Indicated for qualitative detection of cotinine and marijuana in human oral fluid for over-the-counter use. Provides preliminary results requiring confirmation by LC/MS or GC/MS.

Regulatory Classification

Identification

A cannabinoid test system is a device intended to measure any of the cannabinoids, hallucinogenic compounds endogenous to marihuana, in serum, plasma, saliva, and urine. Cannabinoid compounds include delta-9-tetrahydrocannabinol, cannabidiol, cannabinol, and cannabichromene. Measurements obtained by this device are used in the diagnosis and treatment of cannabinoid use or abuse and in monitoring levels of cannabinoids during clinical investigational use.

Special Controls

*Classification.* Class II (special controls). A cannabinoid test system is not exempt if it is intended for any use other than employment or insurance testing or is intended for Federal drug testing programs. The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 862.9, provided the test system is intended for employment and insurance testing and includes a statement in the labeling that the device is intended solely for use in employment and insurance testing, and does not include devices intended for Federal drug testing programs (*e.g.,* programs run by the Substance Abuse and Mental Health Services Administration (SAMHSA), the Department of Transportation (DOT), and the U.S. military).

Predicate Devices

• Healgen® Accurate Oral Fluid Drug Test, Healgen® Accurate Oral Fluid Drug Test COT (K223162)

Submission Summary (Full Text)

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FDA

U.S. FOOD & DRUG

ADMINISTRATION

# 510(k) SUBSTANTIAL EQUIVALENCE DETERMINATION DECISION SUMMARY

ASSAY ONLY

## I Background Information:

A 510(k) Number

K252523

B Applicant

Healgen Scientific LLC

C Proprietary and Established Names

Healgen® Accurate Oral Fluid Drug Test COT/THC; Healgen® Accurate Oral Fluid Drug Test

D Regulatory Information

| Product Code(s) | Classification | Regulation Section | Panel |
| --- | --- | --- | --- |
| NFW, MKU | Class II | 21 CFR 862.3870 - Cannabinoid Test System | TX - Clinical Toxicology |

## II Submission/Device Overview:

A Purpose for Submission:

Over-the-counter claim for predicate device k223162

B Measurand:

Cotinine and marijuana

C Type of Test:

Lateral flow chromatographic immunoassay

## III Intended Use/Indications for Use:

A Intended Use(s):

Food and Drug Administration

10903 New Hampshire Avenue

Silver Spring, MD 20993-0002

www.fda.gov

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See Indications for Use below.

## B Indication(s) for Use:

The Healgen® Accurate Oral Fluid Drug Test COT/THC is a lateral flow chromatographic immunoassay for the qualitative detection of cotinine (COT) and/or marijuana (THC) in oral fluid at the following cut-off concentrations:

| Test | Calibrator | Cut-off (ng/mL) |
| --- | --- | --- |
| Cotinine (COT) | (-) Cotinine | 30 |
| Marijuana (THC) | Delta-9-Tetrahydrocannabinol | 40 |

This test provides only a preliminary result. An alternative laboratory test must be used to confirm the results provided by this drug test. Liquid chromatography mass spectrometry (LC/MS) is the preferred method for the confirmation test.

The Healgen® Accurate Oral Fluid Drug Test is a competitive binding lateral flow immunochromatographic assay for the qualitative and simultaneous detection of Marijuana (THC) and Cotinine in human oral fluid at the cutoff concentrations listed below and their metabolites:

| Test | Calibrator | Cut-off (ng/mL) |
| --- | --- | --- |
| Cotinine (COT) | (-) Cotinine | 30 |
| Marijuana (THC) | Delta-9-Tetrahydrocannabinol | 40 |

This assay provides only a preliminary analytical test result. A more specific alternate chemical method must be used in order to obtain a confirmed analytical result. Gas chromatography mass spectrometry (GC/MS) and liquid chromatography mass spectrometry (LC/MS) are the preferred confirmatory methods.

## C Special Conditions for Use Statement(s):

OTC – Over-the-Counter

## D Special Instrument Requirements:

Not applicable.

## IV Device/System Characteristics:

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# A Device Description:

The Healgen® Accurate Oral Fluid Drug Test COT/THC and Healgen® Accurate Oral Fluid Drug Test are immunochromatographic assays that uses a lateral flow system for the qualitative detection of cotinine and marijuana in human oral fluid. The tests are the first step in a two-step process. The second step is to send the sample for laboratory testing if preliminary positive results are obtained.

The test strip consists of a membrane strip with an immobilized drug conjugate. A colloidal gold labeled antibody complex is dried to one end of the membrane. A control line comprised of a different antibody/antigen reaction is present on the membrane strip. The control line is not influenced by the presence or absence of a drug analyte in the oral fluid and therefore it should be present in all reactions.

## Kit Contents for the Device:

- Test device- Holder cartridge with cup insert, test strips and reagent pads
- Oral fluid (saliva) collection swab
- Identification Label
- Package Insert

# B Principle of Operation:

The Healgen® Accurate Oral Fluid Drug Test is a rapid immunoassay based on the principle of competitive inhibition binding. Therefore, drugs that may be present in the oral fluid specimen compete for antibody binding sites with drugs or metabolites which may be present in the oral fluid specimen.

In the absence of THC and/or COT in the oral fluid specimen the colloidal gold-labeled antibody complex moves with the oral fluid by capillary action to contact the immobilized drug conjugate. An antibody-antigen reaction occurs forming a visible line in the test area. The formation of two (2) visible lines (control and test lines) occurs when the test is negative or below the cut-off for the drug.

When THC and/or COT is present in the oral fluid specimen, the drug or metabolites will compete with the immobilized drug conjugate in the test area for the antibody binding sites on the colloidal gold-labeled antibody complex. If a sufficient drug analyte amount is present it will fill the available binding sites, thus preventing attachment of the drug labeled antibody to the drug conjugate.

The formation of one (1) visible line (control line, no test line) is indicative of a preliminary positive result for the drug. For a procedural control, a pink colored line will appear at the control line region, indicating that the proper volume of specimen was added and that membrane wicking occurred.

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V Substantial Equivalence Information:

A Predicate Device Name(s):
Healgen® Accurate Oral Fluid Drug Test, Healgen® Accurate Oral Fluid Drug Test COT

B Predicate 510(k) Number(s):
K223162

C Comparison with Predicate(s):

| Device & Predicate Device(s): | K252523 | K223162 |
| --- | --- | --- |
| Device Trade Name | Healgen® Accurate Oral Fluid Drug Test COT/THC; Healgen® Accurate Oral Fluid Drug Test | Healgen® Accurate Oral Fluid Drug Test, Healgen® Accurate Oral Fluid Drug Test COT |
| General Device Characteristic Similarities | | |
| Indications For Use | For the qualitative determination of cotinine and marijuana in human oral fluid | Same |
| Calibrators | Cotinine and Delta-9-Tetrahydrocannabinol | Same |
| Methodology | Competitive binding, lateral flow immunochromatographi c assays | Same |
| Type of test | Qualitative | Same |
| Specimen type | Human oral | Same |
| Cut-off Values | COT 30 ng/mL
THC 40 ng/mL | Same |
| General Device Characteristic Differences | | |
| Intended Use | For Over-the-Counter use | For prescription use |

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VI Standards/Guidance Documents Referenced:

ISO 10993-5:2009: Biological evaluation of medical devices - Part 5: Tests for in vitro cytotoxicity.
ISO 10993-10:2010: Biological evaluation of medical devices Part 10: Tests for irritation and skin sensitization
ISO 10993-12:2012: Biological evaluation of medical devices - Part 12: Sample preparation and reference materials.

VII Performance Characteristics (if/when applicable):

A Analytical Performance:

1. Precision/Reproducibility:
The precision/reproducibility was established in K223162.

2. Linearity:
Nonapplicable.

3. Analytical Specificity/Interference:
Specificity was established in K223162.
Cross reactivity was established in K223162.
Drug Recovery was established in K223162.
Sample volume reproducibility was established in K223162.
Read time was established in K223162.

4. Assay Reportable Range:
Not applicable.

5. Traceability, Stability, Expected Values (Controls, Calibrators, or Methods):

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The device is traceable to commercial standards.

6. Detection Limit:
See precision section for predicate k223162 section VII.A.1.

7. Assay Cut-Off:
Refer to precision section for predicate k223162 section VII.A.1.

B Comparison Studies:

1. Method Comparison with Predicate Device:
Method Comparison studies provided in k223162 support this device.

2. Lay User Studies:
Lay User studies for the Healgen® Accurate Oral Fluid Drug Test COT/THC; Healgen® Accurate Oral Fluid Drug Test were performed at three testing sites representative of intended use sites. A total of 160 lay users each received a spiked oral fluid sample to test with the Healgen Accurate Oral Fluid Drug Test device. Then, the same 160 lay users were paired and tested each other, for a total of 80 pairs of lay users and 160 tests. The spiked samples and 160 real samples were tested by LC/MS and results were compared with the lay user results.

An additional lay user study was performed for THC at another testing site representative of intended use sites. 98 lay users with diverse educational and professional backgrounds performed tests. The lay users were paired up to test each other. All lay users perform tests following instruction of the product insert. No one self-tested and each lay user had only one partner.

The results are presented in the tables below:

Spiked sample data results:

Data Summary According to THC Concentrations

| Result
Device Lot | -100% cutoff | -75% cutoff | -50% cutoff | -25% cutoff | +25% cutoff | +50% cutoff | +75% cutoff | +100% cut |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| LC-MS (ng/mL) | 0.00 | 9.5 | 20.7 | 30.2 | 51.4 | 59.2 | 68.3 | 81.5 |
| Lot 1: | 10-/0+ | 12-/0+ | 10-/0+ | 9-/1+ | 7+/0- | 9+/0- | 6+/0- | 6+/0- |
| Lot 2: | 3-/0+ | 3-/0+ | 3-/0+ | 1-/0+ | 1+/0- | 3+/0- | 3+/0- | 3+/0- |

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| Lot 3: | 7-/0+ | 5-/0+ | 7-/0+ | 9-/0+ | 12+/0- | 8+/0- | 11+/0- | 11+/0- |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Negative | 20 | 20 | 20 | 19 | 0 | 0 | 0 | 0 |
| Positive | 0 | 0 | 0 | 1 | 20 | 20 | 20 | 20 |
| Total | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Agreement (%) | 100% | 100% | 100% | 95% | 100% | 100% | 100% | 100% |

## Data Summary According to COT Concentrations

| Result
Device Lot | -100% cutoff | -75% cutoff | -50% cutoff | -25% cutoff | +25% cutoff | +50% cutoff | +75% cutoff | +100% cutoff |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| LC-MS (ng/mL) | 0.0 | 7.5 | 15.4 | 22.3 | 38.1 | 45.4 | 53.4 | 60.9 |
| Lot 1: | 6-/0+ | 10-/0+ | 12-/0+ | 10-/0+ | 10+/0- | 7+/0- | 9+/0- | 6+/0- |
| Lot 2: | 3-/0+ | 3-/0+ | 3-/0+ | 3-/0+ | 1+/0- | 1+/0- | 3+/0- | 3+/0- |
| Lot 3: | 11-/0+ | 7-/0+ | 5-/0+ | 7-/0+ | 9+/0- | 12+/0- | 8+/0- | 11+/0- |
| Negative | 20 | 20 | 20 | 20 | 0 | 0 | 0 | 0 |
| Positive | 0 | 0 | 0 | 0 | 20 | 20 | 20 | 20 |
| Total | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Agreement (%) | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% |

## Native sample data results

## Data Summary According to THC Concentrations

| Drug Concentration | Number of Negative | Number of Positive | Total | The percentage of correct results |
| --- | --- | --- | --- | --- |
| Drug free | 155 | 0 | 155 | 100% |
| < -50% Cut off | 8 | 0 | 8 | 100% |
| -50% Cut off ~ Cut off | 17 | 1 | 18 | 94.4% |
| Cut off ~ +50% Cut off | 5 | 33 | 38 | 86.8% |
| > +50% Cut off | 0 | 39 | 39 | 100% |

## Data Summary According to COT Concentrations

| Drug Concentration | Number of Negative | Number of Positive | Total | The percentage of correct results |
| --- | --- | --- | --- | --- |
| Drug free | 45 | 0 | 45 | 100% |
| <-50% Cut off | 13 | 0 | 13 | 100% |
| -50% Cut off ~ Cut off | 17 | 2 | 19 | 89.5% |
| Cut off ~ +50% Cut off | 1 | 12 | 13 | 92.3% |
| > +50% Cut off | 0 | 70 | 70 | 100% |

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3. Matrix Comparison:
Not Applicable

C Clinical Studies:
1. Clinical Sensitivity:
Not applicable.
2. Clinical Specificity:
Not applicable.
3. Other Clinical Supportive Data (When 1. and 2. Are Not Applicable):
Not applicable.

D Clinical Cut-Off:
Not applicable.

E Expected Values/Reference Range:
Not applicable.

VIII Proposed Labeling:
The labeling supports the finding of substantial equivalence for this device.

IX Conclusion:
The submitted information is adequate to support an SE decision.

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