Skip to content

To investigate the efficacy and safety of Yokukansan for patients with insomnia

To investigate the efficacy and safety of Yokukansan for patients with insomnia - To investigate the efficacy and safety of Yokukansan for patients with insomnia

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-UMIN000001412
Enrollment
10
Registered
2008-10-03
Start date
2008-10-01
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Psychophysiological insomnia

Interventions

Divide Yokukansan`s daily dosage of 7.5g into three doses and administer before or between meals for 7 consecutive days.

Sponsors

The Jikei university school of medicine
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1) Patients who have been diagnosed with psychophysiological insomnia according to the diagnostic criteria outlined by Internationl Classification of Sleep Disorder II (ICSD II). 2) Patients who report insomnia of greater than 4 weeks of duration. 3) Age specification: Patients who are between ages 20-65 (at the time of signing informed consent). 4) Patients who have signed consent to participate in this research. 5) There is no gender specification.

Exclusion criteria

Exclusion criteria: 1) Patients with insomnia that accompany schizophrenia and manic-depressive psychosis. 2) Patients with pharmacologically-induced insomnia, including anti-Parkinson`s, anti-hypertensive and steroid-type drugs. 3) Patients with insomnia due to serious psychosomatic disorders. 4) Patients who have sleep-related respiratory disorders, Periodic Limb Movement Disorder and Restless Leg Syndrome. 5) Patients who have taken Kampo medicine within the last 4 weeks. 6) Patients who have taken psychotropic drugs, anti-histamine drugs, or melatonin, etc. within the last 4 weeks. 7) Patients who have participated in research with other interventions. 8) Patients who are otherwise classified as unfit by the attending physicians for the research.

Design outcomes

Primary

MeasureTime frame
Perform PSG before and after administering Yokukansan for seven consecutive days. PSG data will then be investigated with R&K and CAP(Cyclic alternating pattern).

Secondary

MeasureTime frame
1. Acti-graph (device to measure activity level) : Device is worn throughout the entire duration of the test, from 3 days prior to performing PSG until the end of test. 2. Sleep diary: Recorded 3 days prior to performing PSG until the end of test. 3. PSQ (Pittsburgh Sleep Quality Index): Recorded before PSG is performed. 4. PVT (psychomotor vigilance task): Performed after PSG testing (1. immediately upon waking, 2. at 9am, 3. at 11am) 5. VAS (visual analog scale): Recorded after PSG is performed (1. immediately upon waking, 2. at 9am, 3. at 11am) 6. SSS (Standford Sleepiness Scale): Raecorded after PSG is performed (1. immediately upon waking, 2. 9:00AM, 3. 11:00AM) 7. SAM (Space Aeromedicine Fatigue Checklist): Recorded after PSG is performed (1. immediately upon waking, 2. 9:00AM, 3. 11:00AM) 8. SMH (St. Mary`s Hospital Sleep Questionnaire): Recorded after PSG is performed (1. 8:00AM)

Countries

Japan

Contacts

Public ContactMotohiro Ozone

The Jikei university school of medicine Department of Psychiatry

03-3433-1111

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026