Circadia® provides clinical grade sleep and stress management when used for 20 minutes a day. Manufactured by Fisher Wallace Laboratories, the device is technologically identical to the FDA-Cleared Fisher Wallace Stimulator® (used by over 60,000 patients in the United States) but may be purchased without a prescription.

Proven in multiple published studies, Circadia® manages sleep and stress by comfortably stimulating the brain to produce serotonin while lowering cortisol (the stress hormone), modulating the brain's Default Mode Network, and entraining a calm brainwave state.

The device does not cause any serious side effects. Less than 1% of customers may experience a mild, temporary headache or dizziness. Customers typically experience results within the first week of use.

100% Free Returns

Customers may return Circadia® for a full refund within 30 days of receipt, free of charge.

Product Reviews

Circadia Reviews

Individual results may vary

"Circadia, which I podcasted on here and have an article about here, provides clinical-grade sleep and stress management."

Ben Greenfield, Founder, Ben Greenfield Fitness

"Since I couldn't stop talking about my good mood and hyper-charged focus, my friends stopped laughing and started asking if they could borrow it."

Nina Burleigh, ELLE Magazine

"It's made my life better."

Mike Davis, Vietnam Veteran

"That device reintroduced that feeling of normality to me."

Logan Shield, US Marine (Ret.)

"I have seen very positive results, often within the first two weeks."

Richard Brown, MD, Columbia University

"I'm a strong proponent of making these devices widely available."

Stephen N. Xenakis, MD, US Army (Ret.)

"One of four technologies innovating mental health."

Tori Utley, Forbes Magazine

(Individual results may vary)

Do You Qualify
to Use the Device?

Do you have a medical device implanted in your head or neck?

Do you have a pacemaker?

Do you have, or suspect you have, heart disease?

Are you 21 years of age or older?

Our refund policy allows patients to return their Circadia® device for a refund within 30 days of receipt. Fisher Wallace applies a 15% return fee to cover the cost of device processing, and does not refund the cost of shipping. Refund checks (for 85% of the purchase price) are mailed within five weeks of receipt of an undamaged device.

Powerful Relief,
Yet Comfortable

Circadia® uses prescription-strength brain stimulation technology from Fisher Wallace Laboratories that is comfortable and easy-to-use. Users typically feel relaxed within the first 10 minutes of use and achieve rapid sleep and stress management results.

On Demand

Circadia® is light and portable and runs on two AA batteries. Use it at home or wherever you travel.

On Demand

Circadia® is light and portable and runs on two AA batteries. Use it at home or wherever you travel.

Free Returns

Customers may return Circadia® for a full refund within 30 days of receipt, free of charge. Fisher Wallace provides its customers with a free return shipping label via email, does not charge any additional fees, and refunds the full purchase price.

Our Advisory Board

Meir Kryger
Mitchell Rosenthal
Stephen N. Xenakis
Lauri Liskin
J Roberto Trujillo
M.D., Sc.D.
Ronald Podell
Robert Cancro
Sandlin Lowe
Bruce Johnson

Clinical-Grade Technology

Circadia® has been scientifically proven to manage stress and sleep and may be obtained without a prescription. Manufactured by Fisher Wallace Laboratories, Circadia® uses the same technology as the Fisher Wallace Stimulator® and works by comfortably stimulating the brain to produce serotonin and melatonin while lowering cortisol. You may return your device for a refund within 30 days of receipt.

Scientific Evidence

All clinical studies performed with the Fisher Wallace Stimulator® used the same stimulation dosage as Circadia®. Circadia® and the Fisher Wallace Stimulator® are manufactured by Fisher Wallace Laboratories.

Cerebrospinal Fluid And Plasma Neurochemicals Response To Cranial Electrical Stimulation.

Shealy CN, Cady RK, Wilkie RG, et al.
J Neurol Orthop Med Surg 1998;18:94-97. (PubMed link)

Open PDF

Depression: a diagnostic neurochemical profile & therapy with cranial electrical stimulation (CES).

R.K., Wilkie, R.G., Cox, R.H., Liss, S., Closson, W. The Journal of Neurological & Orthopaedic Medicine & Surgery. Dec 1989. 10(4):319-321.
(PubMed link)

Open PDF

Gathering Effect

Liss, S, Liss B. Presented at the American Academy of Pain Management Conference Las Vegas, Nevada---September 1999
(PubMed link)

Open PDF

Physiological and Therapeutic Effects of High Frequency Electrical Pulses.

Liss S, Liss B.
Integr Physiol Behav Sci. 1996 Apr-Jun;31(2):88-95.(PubMed link)

Open PDF

Alternating low frequency stimulation of medial septal and commissural fibers induces NMDA-dependent, long-lasting potentiation of hippocampal synapses in urethane-anesthetized rats.

Habib D, Dringenberg HC.
Hippocampus. 2009 Mar;19(3):299-307. doi: 10.1002/hipo.20507. (PubMed link)

Open PDF

Potential and current density distributions of cranial electrotherapy stimulation (CES) in a four-concentric-spheresmodel.

Ferdjallah M, Bostick FX Jr, Barr RE.
IEEE Trans Biomed Eng. 1996 Sep;43(9):939-43. (PubMed link)

Open PDF

Is Transcranial Electrical Stimulation (TCES) a safe intervention for children with Cerebral Palsy?

Alon, G, Syron S, Smith G
Neurorehabil Neural Repair June 1998 vol. 12 no. 2 65-71

We tested the safety of transcranial electrical stimulation (TCES) applied to seven children (age range 2.5 to 7.5 years) with a confirmed diagnosis of cerebral palsy (CP). Adverse responses were assessed by negative changes in the gross motor function measure test (GMFM), the popliteal angle, and the occurrence of any undesired systemic responses such as seizure, nausea, vomiting, or sleep disruption. The tests first were given before the commencement of a physical therapy exercise (PTE) program combined with a home program of TCES. The tests were repeated after 8 weeks of PTE + TCES and once again after an additional 8 weeks of PT + TCES. One of the 8- week periods involved placebo stimulation in a double-blind design. Stimulator amplitude was 0.5 mA of peak current, phase charge was 0.0166 C, and the averaged RMS current was 249 microamperes. This level was below threshold of sensory nerve excitation, and the child did not perceive the stimulation. Electrodes were placed over the right and left temporal areas of the skull. The stimulation was applied by the parents for 10 minutes, twice a day, 7 days each week. The total goal GMFM scores were greater after both active and placebo stimulation. The popliteal angle improved irrespective of the stimulation intervention. No adverse systemic responses were reported. These results support the hypothesis that TCES as used in this study is a safe procedure.

Open PDF

Cranial Electrotherapy Stimulation: A Safe Neuromedical Treatment for Anxiety, Depression, or Insomnia

Gilula, Marshall F. MD; Barach, Paul R. MD, MPH
Southern Medical Journal. 2004; Vol. 97(12).

Open PDF

Cognitive, mood, and electroencephalographic effects of noninvasive cortical stimulation with weak electrical currents.

Tadini L, El-Nazer R, Brunoni AR, Williams J, Carvas M, Boggio P, Priori A, Pascual-Leone A, Fregni F.
J ECT. 2011 Jun;27(2):134-40. doi: 10.1097/YCT.0b013e3181e631a8. (PubMed link)

OBJECTIVES:The use of noninvasive cortical electrical stimulation with weak currents has significantly increased in basic and clinical human studies. Initial, preliminary studies with this technique have shown encouraging results; however, the safety and tolerability of this method of brain stimulation have not been sufficiently explored yet. The purpose of our study was to assess the effects of direct current (DC) and alternating current (AC) stimulation at different intensities in order to measure their effects on cognition, mood, and electroencephalogram.
METHODS:Eighty-two healthy, right-handed subjects received active and sham stimulation in a randomized order. We conducted 164 ninety-minute sessions of electrical stimulation in 4 different protocols to assess safety of (1) anodal DC of the dorsolateral prefrontal cortex (DLPFC); (2) cathodal DC of the DLPFC; (3) intermittent anodal DC of the DLPFC and; (4) AC on the zygomatic process. We used weak currents of 1 to 2 mA (for DC experiments) or 0.1 to 0.2 mA (for AC experiment).
RESULTS: We found no significant changes in electroencephalogram, cognition, mood, and pain between groups and a low prevalence of mild adverse effects (0.11% and 0.08% in the active and sham stimulation groups, respectively), mainly, sleepiness and mild headache that were equally distributed between groups.
CONCLUSIONS: Here, we show no neurophysiological or behavioral signs that transcranial DC stimulation or AC stimulation with weak currents induce deleterious changes when comparing active and sham groups. This study provides therefore additional information for researchers and ethics committees, adding important results to the safety pool of studies assessing the effects of cortical stimulation using weak electrical currents. Further studies in patients with neuropsychiatric disorders are warranted.

Open PDF

Product Reviews

A Real Patient: Mike

Refunds and Repairs

Refund Policy

Customers may return their Circadia® device for a refund within 30 days of receipt, free of charge. Fisher Wallace provides its customers with a free return shipping label via email, does not charge any additional fees, and refunds the full purchase price. Refunds are processed within five weeks following the receipt of an undamaged device.

To initiate a return for a refund, please visit this page.


If you are having difficulty using your device, please read the troubleshooting section of the instructional manual, where you will find solutions for the most common problems. If you still need help, please call us at 800.692.4380. If we cannot solve your problem over the phone, we will repair or replace your device at no charge, so long as it is still under warranty.

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Many patients do not feel the stimulation at all, while others feel a mild tingling at the sponge contact sites.

CIRCADIA® works by comfortably stimulating the brain to produce serotonin, endorphins and melatonin while lowering the stress hormone cortisol, modulating the Default Mode Network and entraining a calm brainwave state. 

CIRCADIA® and the Fisher Wallace Stimulator® are identical technologically, but CIRCADIA® is defined as a general wellness device because it is intended to help people manage sleep and stress. CIRCADIA® is not intended to treat medical conditions. The Fisher Wallace Stimulator® is defined as a medical device because it is indicated to treat anxiety, insomnia and depression.

CIRCADIA® is powered by two AA batteries which typically last for six months of daily usage.

Based on over 10 years of patient monitoring and reporting associated with the Fisher Wallace Stimulator® (from which CIRCADIA® is technologically cloned), there are no long-term negative effects of using our technology.

We recommend using CIRCADIA® every day for the first 30 days. You may then continue on a daily basis, maintenance basis (3-4 times per week) or on an as-needed basis. There are no negative effects associated with abruptly ceasing its use.

Most users will feel more relaxed after 10 minutes of stimulation and will experience durable results after the first two weeks of daily use.

WebMD lists the following signs of stress:

  • Becoming easily agitated, frustrated and moody
  • Feeling overwhelmed, like you are losing control or need to take control
  • Having difficulty relaxing and quieting your mind
  • Feeling bad about yourself (low self-esteem), lonely, worthless and depressed
  • Avoiding others
  • Low energy
  • Headaches
  • Upset stomach
  • Aches, pains, and tense muscles
  • Chest pain and rapid heartbeat
  • Insomnia
  • Frequent colds and infections
  • Loss of sexual desire and/or ability
  • Nervousness and shaking, ringing in the ear
  • Cold or sweaty hands and feet
  • Excess sweating
  • Dry mouth and difficulty swallowing
  • Clenched jaw and grinding teeth

If we have an authorization on file, the device will ship within 5 - 10 business days. You may track your package via the link that is emailed to you after purchasing the device.

Less than 1% of CIRCADIA® users may experience a temporary headache, dizziness or skin irritation at the electrode sites. CIRCADIA® may be used safely in conjunction with any medication.

Have more questions? Please chat with us online or email info@circadia.info.