Empower patients to overcome opiod withdrawal.

The first FDA cleared drug-free, personalized solution for opioid withdrawal relief.

Clinically Proven

Helping Patients Face the 800-Pound Gorilla of Withdrawal

Millions of Americans who still struggle with opioid dependence or addiction need to take one painful, difficult step to reduce or eliminate opioids from daily use. They all must overcome withdrawal—the 800-pound gorilla standing in the way of opioid-free living. Withdrawal is such a huge roadblock that two out of every five adults who need opioid reduction simply won’t seek treatment.1

And, the longer a patient avoids overcoming withdrawal, the greater the risk they face for additional complications, including:

  • Constipation
  • Depression
  • Sexual Dysfunction
  • Pain Sensitivity
  • Weakened immune system
  • Addiction
  • Respiratory failure
  • Fatal overdose
Helping Patients Overcome, Heal, & Achieve

Helping patients reduce or eliminate opioids from daily use can be frustrating. As a physician, there are limited clinically proven treatment options that also don’t introduce additional challenges, like drug interactions, side-effects, or safety and compliance concerns.

Why Consider the Sparrow Therapy System?

Clinically Proven

  • 89% of patients showed a clinically meaningful reduction in COWS in the first 60 minutes*
  • Average symptom reduction of 60% within the first two hours of treatment
  • Symptom improvements lasting throughout the five-day withdrawal period
*15% or greater reduction in COWS is considered clinically meaningful. Data on file.


  • Drug-free treamtment option
  • No known drug interactions or adverse events
  • No systemic side-effects
  • Non-invasive therapy


  • Painless, needle-free application of non-invasive tAN Earpiece
  • Quick start-up & activation
  • No interference with activities of daily living
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The Sparrow Therapy System comes complete with:

Sparrow Earpieces

  • Discreet
  • Comfortable
  • Daily disposable

Patient Controller

  • Easy to use
  • Portable
  • Battery powered

Clinician Programming App

  • Intuitive interface
  • Wireless Bluetooth connection
Indication for Use

The Sparrow is a transcutaneous nerve field stimulator that is intended to be used in patients experiencing opioid withdrawal in conjunction with standard symptomatic medications and other therapies for opioid withdrawal symptoms under the supervision of trained clinical personnel.

How It Works

The Sparrow Therapy System uses Transcutaneous Auricular Neurostimulation (tAN) to treat withdrawal symptoms. The wearable earpiece is designed to be worn up to 24 hours a day throughout opioid reduction or as prescribed to aid in the reduction of withdrawal symptoms.


Sparrow delivers individually tailored electrical stimulation transcutaneously (through the skin)


Targets cranial nerve branches of the Trigeminal (CN V) and Vagus (CN X) nerves


Stimulation activates central brain structures to release endogenous opioids (endorphins)


Endorphins fill the vacant opioid receptors to help alleviate opioid withdrawal symptoms


ABVN: Auricular Branch of the Vagus Nerve
Amyg: Amygdala
Arc: Arcuate Nucleus
ATN: Auriculotemporal Nerve
LC: Locus Coeruleus
NAC: Nucleus Accumbens
NTS: Nucleus Tractus Solitarius
PB: Parabranchial Nucleus
PFC: Prefrontal Cortex
TCC: Trigeminocervical Complex
VTA: Ventral Tegmental

Backed by Clinical Data

The Sparrow Therapy System is the first and only FDA cleared non-invasive device for opioid withdrawal backed by evidence from a double-blind, randomized controlled clinical trial targeting patients with opioid use disorder.

Here’s what we discovered in the first 26 patients:

Within the first day of therapy, 92% of clinical trial participants experienced a 30% or greater reduction in their COWS score, with an average reduction in COWS of 60%.*

Participants experienced a clinically meaningful reduction in withdrawal symptoms in the short term —within 60 minutes— and long-term, up to five days.

By day two, 100% of participants sustained a clinically meaningful reduction of opioid withdrawal symptoms, and on day five, 54% successfully completed the detox process. 93% of participants accepted a referral to continue addiction treatment.

*15% or greater reduction in COWS is considered clinically meaningful. Data on file.

Begin Prescribing the Sparrow Therapy System

Schedule a Consultation

It's important to us that the Sparrow Therapy System is the right option for your patients. We'll take time to learn about your challenges and work with you to determine how tAN therapy can help.

Build a Clinical Roadmap

Our Withdrawal Program Consultants will work with you and your staff to successfully integrate tAN Therapy into your practice and approach to withdrawal.

Offer Patients a New Way Forward

Begin prescribing an easy, safe, and effective drug-free option to overcome withdrawal.

Schedule a Consultation

What Others Have to Say About The Sparrow Therapy System

We’re very excited to partner with Spark on this research. We share common values as innovators in the field, and this device shows promise for people who are dependent on opioids.
Dr. Carlos Tirado MD, MPH
Chief Medical Officer of Carma Health Management