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Org3770 FM-2 Phase II

A randomized, double-blind, placebo-controlled, phase II study of Org 3770 (mirtazapine) in the treatment of patients with fibromyalgia.

Status
Unknown
Phases
Phase 2
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2080221959
Enrollment
400
Registered
2012-11-09
Start date
2012-11-09
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

fibromyalgia

Interventions

investigational material(s) Generic name etc : Org 3770 tablet 15mg INN of investigational material : mirtazapine Therapeutic category code : 117 Psychotropic agents Dosage and Administration for Inve

Sponsors

Meiji Seika Pharma Co., Ltd.
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Patients with fibromyalgia as defined with "The American College of Rheumatology 1990 Criteria", who meet all inclusion criteria and do not meet all exclusion criteria. - Patients with a score >= 40 mm on VAS pain score at screening visit and at baseline visit - Patients with a score >= 4 on NRS pain score at baseline visit - Patients who have been explained study objectives, methods and other aspects of study, and can give voluntary consent in writing etc.

Exclusion criteria

Exclusion criteria: - Patients with pain disorder except fibromyalgia - Patients with inflammatory or rheumatologic disease - Patients with treated but uncontrolled hepatic, renal, cardiovascular, respiratory, gastrointestinal, endocrine, or cerebrovascular diseases, or other clinically significant concomitant physical diseases - Patients with schizophrenia, other psychotic disease or bipolar disorder, and patients with these histories - Patients with major depression disorder - Patients with epilepsy or spasm disease, and patients with these histories - Patients who had received MAO inhibitor within 14 days prior to baseline visit - Pregnant patients, patients who breast-feeds a baby and patients who want to be pregnant - Patients who had received other investigational drugs within 90 days prior to screening visit etc.

Design outcomes

Primary

MeasureTime frame
NRS Amount of change from baseline

Secondary

MeasureTime frame
VAS, and so on Amount of change from baseline

Outcome results

None listed

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