Changes in the MFIS: Modified Fatigue Impact Scale (MFIS) is a PRO, consisting of 21 statements that describe the effect of fatigue. Subject will choose an answer (0= never to 4=always) that best describes how fatigue has affected them in the past 4 weeks. Item scores are summed to a total score. The total MFIS score ranges from 0 to 84, with three subscales: Physical range 0-36, Cognitive range 0-40, and Psychosocial range 0-8. Higher scores indicate higher level of fatigue.
Multiple Sclerosis Impact Scale (MSIS) is a patient reported outcome (PRO) measure, consisting of two subscales- physical impact of MS (20 items) and psychological impact (9 items). It asks subject to rate the impact MS has their daily life in the past 2 weeks (1=low impact to 4=large impact). Individual item scores are summed to create a raw score, which is then transformed on a scale from 0 to 100 for each subscale. Higher scores indicate greater impact of MS on QoL.
Physical - Baseline
Group
Value
95% CI
3 mg Melatonin
10
3.00 – 10.0
5 mg Melatonin
9.00
5.00 – 9.00
Physical - 3 Months Visit
Group
Value
95% CI
3 mg Melatonin
4.5
4.00 – 4.50
5 mg Melatonin
8.00
4.00 – 8.00
Physical - 6 months visit
Group
Value
95% CI
3 mg Melatonin
7.0
2.50 – 7.0
5 mg Melatonin
5.00
2.00 – 5.00
Physical - 12 months visit
Group
Value
95% CI
3 mg Melatonin
9.00
2.00 – 9.00
5 mg Melatonin
8.00
2.00 – 8.00
Psychological - Baseline
Group
Value
95% CI
3 mg Melatonin
8.0
4.50 – 8.00
5 mg Melatonin
14.0
9.50 – 14.0
Psychological - 3 months visit
Group
Value
95% CI
3 mg Melatonin
12.5
6.50 – 12.5
5 mg Melatonin
8.0
3.00 – 8.00
Psychological - 6 months visit
Group
Value
95% CI
3 mg Melatonin
3.0
3.00 – 3.00
5 mg Melatonin
9.50
8.00 – 9.50
Psychological - 12 months visit
Group
Value
95% CI
3 mg Melatonin
8.0
0.750 – 8.00
5 mg Melatonin
11.0
6.00 – 11.0
Pittsburgh Sleep Quality Index (PSQI)Secondary· Baseline (month 0), Month 3, Month 6, and Month 12
Changes in PSQI: Pittsburgh Sleep Quality Index (PSQI) asks 10 sets of questions about sleep quality and pattern in the past month. The scale derive 7 component scores based on a 0 to 3 scale (0= no difficulty, 3=severe difficulty) which are summed to a global score (range 0 to 21). Higher scores indicates worse sleep quality.
Changes in PDDS-PS: Patient Determined Disease Steps and Performance Scales (PDDS-PS) is a PRO for MS disease status. Performance Scales (PS) has 8 subscales: mobility range, hand function range, vision range, fatigue range, cognition range, bowel/bladder range, sensory range, and spasticity range. Subject self-classify their level of disability on a 0 to 8 scale (0=Normal to 8=Bedridden) with 8 being the most disabled for PDDS. For Performance Scales (PS) subject self-classify their level of disability on a 0 to 6 scale (0=Normal to 6=Bedridden) with 6 being the most disabled for PS - Mobilit
Patient Determined Disease Steps - Baseline
Group
Value
95% CI
3 mg Melatonin
1.0
0 – 1.0
5 mg Melatonin
0
0 – 0
Patient Determined Disease Steps - 3 Month Visit
Group
Value
95% CI
3 mg Melatonin
1.0
0 – 1.0
5 mg Melatonin
0
0 – 0
Patient Determined Disease Steps - 6 Month Visit
Group
Value
95% CI
3 mg Melatonin
0.50
0 – 0.50
5 mg Melatonin
0.50
0 – 0.50
Patient Determined Disease Steps - 12 Month Visit
Group
Value
95% CI
3 mg Melatonin
0.50
0 – 0.50
5 mg Melatonin
1.0
0 – 1.0
Performance Scale - Mobility - Baseline
Group
Value
95% CI
3 mg Melatonin
0
0 – 0
5 mg Melatonin
0
0 – 0
Performance Scale - Mobility - 3 Month
Group
Value
95% CI
3 mg Melatonin
0
0 – 0
5 mg Melatonin
0
0 – 0
Performance Scale - Mobility - 6 Month
Group
Value
95% CI
3 mg Melatonin
0.500
0 – 0.500
5 mg Melatonin
0
0 – 0
Performance Scale - Mobility - 12 Month
Group
Value
95% CI
3 mg Melatonin
0
0 – 0
5 mg Melatonin
0
0 – 0
Adverse events — posted to ClinicalTrials.gov
Time frame: The period during which all adverse events and serious adverse events collected began after the informed consent is obtained and ended 30 days following the last administration of study treatment and IP assignments unblinded or study discontinuation/termination, whichever is earlier, up to 5 years..
Reporting threshold: 0%.
Adverse-event reports describe events observed during the trial — not all are caused by the drug.
3 mg Melatonin
Serious: 1/15 (7%)
Deaths: 0/15
5 mg Melatonin
Serious: 0/15 (0%)
Deaths: 0/15
Serious adverse events (3 terms)
Reaction
System
3 mg Melatonin
5 mg Melatonin
Near-syncope
Cardiac disorders
—
—
Pacemaker insertion
Cardiac disorders
—
—
Heart block
Cardiac disorders
—
—
Other adverse events (144 terms — click to expand)
Reaction
System
3 mg Melatonin
5 mg Melatonin
Upper respiratory infection
Respiratory, thoracic and mediastinal disorders
—
—
INCREASED FATIGUE
Psychiatric disorders
—
—
NECK PAIN
Musculoskeletal and connective tissue disorders
—
—
Urinary tract infection
Skin and subcutaneous tissue disorders
—
—
IRRITABILITY
Psychiatric disorders
—
—
WORSENING DEPRESSION
Psychiatric disorders
—
—
Dizziness
Nervous system disorders
—
—
INCREASED HEADACHES
Nervous system disorders
—
—
FLU LIKE SYMPTOMS AFTER 2ND SHINGRIX VACCINE
Respiratory, thoracic and mediastinal disorders
—
—
Acute Sinusitis
Respiratory, thoracic and mediastinal disorders
—
—
Acute viral syndrome with ageusia
Respiratory, thoracic and mediastinal disorders
—
—
Shortness of breath
Respiratory, thoracic and mediastinal disorders
—
—
Acute non-reccurrent frontal sinusitis
Respiratory, thoracic and mediastinal disorders
—
—
Sleep Apnea
Respiratory, thoracic and mediastinal disorders
—
—
Essential hypertension
Cardiac disorders
—
—
Type II diabetes
Endocrine disorders
—
—
NIGHT SWEATS
Endocrine disorders
—
—
Thyroid lobectomy
Endocrine disorders
—
—
Thyroid/neck nodule increasing in size
Endocrine disorders
—
—
Elevated liver function test
Blood and lymphatic system disorders
—
—
Leukopenia
Blood and lymphatic system disorders
—
—
Worsening hypercholesterolemia
Blood and lymphatic system disorders
—
—
Cold Sore, Right Upper Lip
Infections and infestations
—
—
POSITIVE JCV INDEX
Infections and infestations
—
—
Shingles
Infections and infestations
—
—
COVID Infection
Infections and infestations
—
—
LOSS OF TONE/SORENESS, LEFT GLUTEUS MUSCLE
Musculoskeletal and connective tissue disorders
—
—
WORSENING OF LEG WEAKNESS, UPPER LEFT THIGH/QUAD, BILATERAL
To date, there are no published data on the role of melatonin supplementation or the appropriate dose for patients with multiple sclerosis. Because of the potential benefits of melatonin, this pilot study will be an exploratory investigation to evaluate the effect of supplementing melatonin in subjects with multiple sclerosis who are taking an oral disease modifying therapy (DMT) for 6 months or longer. It is our intent that the results of this study will support the rationale and be a prelude to a larger trial which can focus on clinical efficacy of melatonin therapy outcomes.
Publications & conference data
6 peer-reviewed publications reference this trial (live from Europe PMC):
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Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Providence Health & Services
Last refreshed: 30 March 2025
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT03498131.