Condition category
Urological and Genital Diseases
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting
Publication status
Results overdue

Plain English Summary

Not provided at time of registration

Trial website

Contact information



Primary contact

Dr David Bell


Contact details

Bio-Kinetic Europe Limited
14 Great Victoria Street
+ 44 (0)28 9081 8381

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title

A multi-centre, double-blind, placebo-controlled, multiple-dose crossover proof of concept study to compare the efficacy of mefenamic acid administered vaginally and orally in healthy menstruating women with primary dysmenorrhoea requiring analgesia


Study hypothesis

Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) are commonly prescribed for dysmenorrhoea, and are very effective. However, all oral NSAIDs can cause gastrointestinal upset. This study aims to assess a direct vaginal delivery system for a well established NSAID in patients with primary dysmenorrhoea. Potential advantages for intra-vaginal delivery of NSAIDs are higher local concentrations of active agent and a reduced incidence of gastrointestinal side effects.

Ethics approval

Office for Research Ethics Committees Northern Ireland (ORECNI), 25/05/2007, ref: 07/NIR03/42

Study design

Multi-centre double-blind placebo-controlled multiple-dose crossover study

Primary study design


Secondary study design

Randomised cross over trial

Trial setting

Not specified

Trial type


Patient information sheet

Not available in web format, please use the contact details to request a patient information sheet


Primary dysmenorrhoea


Subjects will attend a total of four study visits over three menstrual periods:
1. A screening visit (Visit 1) before the first menstrual bleed
2. A treatment period visit (Visit 2) prior to the second menstrual bleed
3. A treatment period visit (Visit 3) prior to the third menstrual bleed
4. A follow-up visit (Visit 4) after treatment of the third menstrual bleed

Oral capsules = 2 x 250 mg
Intra-vaginal NSAID applied to tampons = 1 x 80 mg

Tampons will be used to dose up to six times during a single 24-hour period. Tampons will remain in situ for four hours, except overnight when a tampon may be worn for eight hours if desired. Capsules for oral administration will be taken three times daily (at intervals of eight hours) for 24 hours.

Intervention type



Not Applicable

Drug names

Mefenamic acid

Primary outcome measure

Menstrual-related pain intensity, recorded in a diary at baseline and a variety of timepoints over 24 hours

Secondary outcome measures

Safety and tolerability of PSD508, measured over a period of 24 hours

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. Healthy menstruating female with a history of primary dysmenorrhoea
2. Menstrual-related pain with cramping for which she requires the use of analgesics during each cycle
3. Regular menstrual cycles
4. Routinely uses intra-vaginal tampons and is able to use tampons without an applicator
5. Aged 18 to 40 years inclusive
6. No clinically significant medical history and normal clinical examination other than the underlying pathology requiring treatment, in the opinion of the Investigator
7. Able to understand and complete the rating scales
8. Provided written informed consent

Participant type


Age group




Target number of participants

Approximately 105 subjects will be enrolled to achieve 90 completed subjects.

Participant exclusion criteria

A subject will be excluded from study participation if she meets any of the following criteria:
1. Has a history of, or known, hypersensitivity to mefenamic acid
2. Has a history of reactions such as asthma, urticaria, or allergic type reactions to other NSAIDs
3. Has received another investigational product within three months prior to screening
4. Is unwilling to avoid the use of any:
4.1. Opiate* within 24 hours
4.2. NSAID within 6 hours, or
4.3. Paracetamol within 4 hours, of starting study medication
5. Is pregnant, lactating, or is planning to become pregnant during the study
6. Is currently receiving or has received any hormonal contraception within the previous three months
7. Does not agree to use suitable non-hormonal contraception for the duration of the study
8. Has a history of Toxic Shock Syndrome (TSS)
9. Has a current untreated Sexually Transmitted Disease (STD) that could interfere with the study
10. Has, or has had, ulcerative, vesicular or papillomatous lesions of the cervix, vagina or genital area
11. Is known not to respond to mefenamic acid
12. Has signs or symptoms that contraindicate the administration of mefenamic acid
13. Has unresolved alcohol or drug abuse
14. Has severe menorrhagia which, in the opinion of the investigator, could interfere with the study
15. Is using complementary therapy, such as evening primrose oil, for the treatment of symptoms
16. Has any other condition which, in the opinion of the investigator, may interfere with the study

*Up to 16 mg codeine per dose (i.e., 2 co-codamol 8/500 mg tablets) is acceptable

Recruitment start date


Recruitment end date



Countries of recruitment

United Kingdom

Trial participating centre

Bio-Kinetic Europe Limited

Sponsor information


Plethora Solutions Limited (UK)

Sponsor details

c/o Sheryl Caswell
Lupus House
11-13 Macklin Street
United Kingdom
+44 (0)20 7269 8638

Sponsor type




Funder type


Funder name

Plethora Solutions Limited (UK)

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Basic results (scientific)

Publication list

Publication citations

Additional files

Editorial Notes

10/07/2017: No publications found, verifying study status with principal investigator.