Cleared Traditional

K031797 - METHADONE METABOLITE (EDDP) ENZIME IMMUNOASSAY, CAT. NO. 190 (500 TEST KIT), NO. 191 (5000 TEST KIT) (FDA 510(k) Clearance)

Class II Toxicology device cleared through predicate-based substantial equivalence - typically does not require clinical trials.

K031797 · Lin-Zhi International, Inc. · Toxicology device
Download Printable Device Report (PDF)
Optimized for regulatory review, auditing and printing
Oct 2003
Decision
122d
Days
Class 2
Risk

K031797 is an FDA 510(k) clearance for the METHADONE METABOLITE (EDDP) ENZIME IMMUNOASSAY, CAT. NO. 190 (500 TEST KIT), .... Classified as Enzyme Immunoassay, Methadone (product code DJR), Class II - Special Controls.

Submitted by Lin-Zhi International, Inc. (Synnyvale, US). The FDA issued a Cleared decision on October 10, 2003 after a review of 122 days - within the typical 510(k) review window.

This device falls under the Toxicology FDA review panel, regulated under 21 CFR 862.3620 - the FDA toxicology device framework. The Traditional 510(k) pathway establishes clearance through substantial equivalence to a legally marketed predicate device, without requiring clinical trial data.

Device pattern: Standard predicate-based submission. Standard predicate reliance. This clearance follows a standard predicate-based equivalence path within the Toxicology review framework, consistent with the majority of Class II 510(k) submissions.

View all Lin-Zhi International, Inc. devices

Submission Details

510(k) Number K031797 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received June 10, 2003
Decision Date October 10, 2003
Days to Decision 122 days
Submission Type Traditional
Review Panel Toxicology (TX)
Summary Summary PDF
Third-party Review No - reviewed directly by FDA
Regulatory Context
Review time vs. panel average
35d slower than avg
Panel avg: 87d · This submission: 122d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

Device Classification

Product Code DJR Enzyme Immunoassay, Methadone
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 862.3620
What this classification means

Class II devices require demonstration of substantial equivalence to a legally marketed predicate device. This pathway does not require clinical trials - it relies on engineering equivalence and performance data. Most Toxicology devices follow this clearance model.

Regulatory Peers - DJR Enzyme Immunoassay, Methadone

All 62
Devices cleared under the same product code (DJR) and FDA review panel - the closest regulatory comparables to K031797.
LZI Methadone II Enzyme Immunoassay
K192433 · Lin-Zhi International, Inc. · Oct 2019
LZI Methadone Metabolite Enzyme Immunoassay, LZI Methadone Metabolite (100 and 300) Calibrators
K170416 · Lin-Zhi International, Inc. · Jun 2017
Immunalysis EDDP Specific Urine Enzyme Immunoassay, Immunalysis EDDP Urine Calibrators, Immunalysis EDDP Urine Control Sets
K151395 · Immunalysis Corporation · Jul 2015