# K173861: Drug Relief

- Pathway: 510(k) (Traditional)
- Applicant: Dyansys, Inc.
- Decided: May 2, 2018 after 133 days
- Product code: PZR (Percutaneous Nerve Stimulator For Opioid Withdrawal)
- Device class: 2
- Regulation: 21 CFR 882.5896
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 1 generation back to DEN170018 (2017). 1 ancestor in all.
2 later devices descend from it; 1 cites it directly.
0 of 4 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- DEN170018: NSS-2 System, Innovative Health Solutions (Ihs), Inc. (2017) Summary page 4.

## Most influential descendants
- K211971: Drug Relief v1 (2021), 1 descendant of its own
- K221231: Drug Relief v1 (2022), 0 descendants of its own

## Indications for use
The Drug Relief is a percutaneous nerve field stimulatory (PNFS) system, that can be used as an aid to reduce the symptoms of opioid withdrawal, through application to branches of Cranial Nerves V, VII, IX, and X, and the occipital nerves identified by transillumination.

Source page: https://510kreport.com/device/K173861
Methodology: https://510kreport.com/methodology