Efficacy and Safety Study of NPC-01 to Treat Dysmenorrhea

This study has been completed.
Information provided by (Responsible Party):
ClinicalTrials.gov Identifier:
First received: May 21, 2010
Last updated: May 15, 2014
Last verified: May 2014
The purpose of this study is to determine whether NPC-01 is effective in the treatment of dysmenorrhea.

Condition Intervention Phase
Drug: NPC-01
Drug: IKH-01
Drug: Placebo
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Phase 3, Placebo Controlled, Randomized, Double-blinded, Nonsteroidal Antiinflammatory Drug add-on, Clinical Trial of NPC-01 for Treatment of Dysmenorrhea

Resource links provided by NLM:

Further study details as provided by Nobelpharma:

Primary Outcome Measures:
  • Patient Response to Treatment for Dysmenorrhea, as Evaluated by Difference of Total Dysmenorrhea Score (Baseline/Pretreatment-End of Treatment) [ Time Frame: 16weeks ] [ Designated as safety issue: No ]

    The detail of dysmenorrhea score that was used in this study is the following. These subscales summed for a total dysmenorrhea score (minimum 0 to maximum 6). Pain score None 0 : None Mild 1 : There are some troubles for work Moderate 2 : Needing to rest in bed and/or affecting work Severe 3 : Morre than 1 day in bed and not possible to work

    Drug score (during a menstrual period) None 0 : None Mild 1 : taking analgesics for 1 days Moderate 2 : taking analgesics for 2 days Severe 3 : taking analgesics more than 3 days

Secondary Outcome Measures:
  • Difference in the VAS of Primary Dysmenorrhea (Baseline/Pretreatment-End of Treatment) [ Time Frame: 16weeks ] [ Designated as safety issue: No ]
    VAS stands for Visual Analogue Scale of pain. The scale was rated as a graphic rating scale. as a 100mm baseline from 0:No pain to 100:Worst possible pain.

Enrollment: 215
Study Start Date: May 2010
Study Completion Date: April 2011
Primary Completion Date: April 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: NPC-01
Norethisterone 1mg, Ethinyl estradiol 0.02mg
Drug: NPC-01
Norethisterone 1mg, Ethinyl estradiol 0.02mg
Active Comparator: IKH-01
Norethisterone 1mg, Ethinyl estradiol 0.035mg
Drug: IKH-01
Norethisterone 1mg, Ethinyl estradiol 0.035mg
Placebo Comparator: Placebo
Placebo for NPC-01
Drug: Placebo
Placebo for NPC-01

Detailed Description:

The main objective of this study is to confirm the effectiveness and safety profile of NPC-01 in comparison with placebo in the treatment of dysmenorrhea (primary and secondary dysmenorrhea).

Additionally we also investigate the differences of effectiveness of NPC-01 in comparison with IKH-01 in the treatment of secondary dysmenorrhea as a reference, because IKH-01 is already marketed at them.

To achieve these, closed testing procedure is used in this study. After confirming statistical differences between NPC-01 and Placebo in the total dysmenorrhea, stratified analysis is carried out for primary dysmenorrhea (NPC-01, Placebo), and secondary dysmenorrhea (NPC-01, IKH-01 and Placebo).


Ages Eligible for Study:   16 Years and older
Genders Eligible for Study:   Female
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • dysmenorrhea

Exclusion Criteria:

  • severe hepatopathy
  • pregnant woman
  Contacts and Locations
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Please refer to this study by its ClinicalTrials.gov identifier: NCT01129102

Sponsors and Collaborators
Study Director: Naoki Terakawa, M.D.,Ph.D. Nissay Hospital,Osaka,Japan
  More Information

Responsible Party: Nobelpharma
ClinicalTrials.gov Identifier: NCT01129102     History of Changes
Other Study ID Numbers: NPC-01-2 
Study First Received: May 21, 2010
Results First Received: April 10, 2014
Last Updated: May 15, 2014
Health Authority: Japan: Pharmaceuticals and Medical Devices Agency

Additional relevant MeSH terms:
Menstruation Disturbances
Pathologic Processes
Pelvic Pain
Signs and Symptoms
Anti-Inflammatory Agents, Non-Steroidal
Ethinyl Estradiol
Norethindrone acetate
Analgesics, Non-Narcotic
Anti-Inflammatory Agents
Antirheumatic Agents
Contraceptive Agents
Contraceptive Agents, Female
Contraceptives, Oral
Contraceptives, Oral, Synthetic
Hormones, Hormone Substitutes, and Hormone Antagonists
Peripheral Nervous System Agents
Pharmacologic Actions
Physiological Effects of Drugs
Reproductive Control Agents
Sensory System Agents
Therapeutic Uses

ClinicalTrials.gov processed this record on May 02, 2016