ClinicalTrials.gg
CompletedNCT03493841Updated Mar 22, 2019

Comparing Tolerability and Absorption of Racemic and R-lipoic Acid in Progressive Multiple Sclerosis

A Phase 1 interventional study of Alpha Lipoic Acid in Multiple Sclerosis, Progressive Multiple Sclerosis and Secondary Progressive Multiple Sclerosis, sponsored by Rebecca Spain. Completed at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2019-03-22.

Primary conditionMultiple Sclerosis, Chronic ProgressiveRegistry: Multiple SclerosisReclassifiedWhy we changed it
Registry
Multiple Sclerosis — the first condition term the registry derived for this study.
ClinicalTrials.gg
Multiple Sclerosis, Chronic Progressive
Why
  1. The study's listed conditions name Multiple Sclerosis, Chronic Progressive, a narrower term within Multiple Sclerosis.
Confidence
High: the new condition is named in the study's own listed conditions. Of 351 hand-checked studies reclassified this way, 68% were exactly right and 84% in the right disease family; the registry's first term was right for 5% (measured 2026-10-21). How we classify →
Wrong?
Tell us the study's main condition →

Sponsored by Rebecca Spain · Phase 1, Interventional, and Treatment

From the registry’s dates

  • Primary completion was Jan 2019, 7 years 9 months ago, and no results have been posted to the registry.
Phase
Phase 1
Study type
Interventional
Enrollment
20
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

This is a three-week crossover study that will compare how the body absorbs and tolerates two different forms of lipoic acid: R form and racemic form.

Read the detailed description

This three-week double-blind crossover trial will compare two different forms of lipoic acid (LA). Every participant will take one week of daily oral 600mg R LA, have a one week washout period without LA, and take one week of daily oral 1200mg racemic LA. The order of LA type will be determined by randomization. Blood analyses will be performed to determine which form is better absorbed and a side effects questionnaire will be completed at each visit in order to determine which form is better tolerated.

02

Conditions studied

  • Multiple Sclerosis
  • Progressive Multiple Sclerosis
  • Secondary Progressive Multiple Sclerosis
  • Primary Progressive Multiple Sclerosis

Browse trials for

03

In context

Multiple Sclerosis, Chronic Progressive Reclassified

244 studies on the registry are indexed under Multiple Sclerosis, Chronic Progressive; 53 are open to participants now.

This study's enrollment of 20 is below the median of 54 across 189 interventional studies indexed under Multiple Sclerosis, Chronic Progressive.

Browse Multiple Sclerosis, Chronic Progressive studies →

Lead sponsor

This is the only study on the registry with Rebecca Spain as lead sponsor.

Compared within Multiple Sclerosis, Chronic Progressive, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Multiple Sclerosis. The counts are of registry records indexed under each term, refreshed daily. How we classify →

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Diagnosis of Progressive Multiple Sclerosis
  • 18 years of age or older
  • Able to give and adhere to the study activities
  • Able to swallow large oral capsules

Exclusion criteria

Exclusion Criteria:

  • Clinical Multiple Sclerosis relapse in the prior 1 year
  • Oral or IV in the prior 3 months
  • Have taken LA in last 30 days
  • kidney disease as determined by the PI including, but not limited to, major kidney disease diagnoses, abnormal laboratory values related to renal function, or other related conditions
  • Insulin-dependent diabetes
  • Other significant ongoing medical illness that may interfere with study procedures
  • Taking oral anticoagulants (e.g. Coumadin). Aspirin, clopidogrel, and dipyridamole are acceptable to take
  • Pregnant or breast-feeding
  • Any condition which would make the patient, in the opinion of the investigator, unsuitable for the study
Terms in these criteria, in plain language(3)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
20 participants (actual)

Study arms

  • Experimental
    Group A

    Group A will receive racemic lipoic acid first and R-lipoic acid second

    Drug: Alpha Lipoic Acid

  • Experimental
    Group B

    Group B will receive R- lipoic acid first and racemic lipoic acid second

    Drug: Alpha Lipoic Acid

Interventions

  • Lipoic acid is an over the counter supplement. Two different forms, R and racemic are available. R-lipoic acid is the naturally occurring form. Racemic lipoic acid is the most commonly available supplement.

    Also known as: lipoic acid, R-lipoic acid

06

What researchers measure

Primary outcomes

  1. Comparison of oral tolerance between R-LA and racemic LA

    Oral tolerance will be determined by the completion of a modified Monitoring of Side Effects Scale at each study visit. This scale asks the participant to rate the following side effects: abdominal pain, appetite: decreased, appetite: increased, constipation, diarrhea, flatulence, nausea/vomiting, taste abnormality (metallic, etc.), thirst: increased, thirst: decreased, and weight: increased. Each side effect will be rated on severity. 0 - the lowest possible score represents "not present". 4 - the highest possible score represents "severe". The relative change in total tolerance score will be compared between R-LA and racemic LA.

    Time frame: Obtained at first (Visits 1 and 3) and last doses (visits 2 and 4) of each form of LA. Each visit is approximately a week apart.

  2. Comparison of serum bioavailability as measured by Area Under the Curve (0-infinity) between R-LA and racemic LA

    Serum bioavailability, as measured by Area Under the Curve (0-infinity) will be compared between R-LA and racemic LA by obtaining concentration values at times 0, 60, 90, 120, 180, and 240 minutes after ingestion of LA dose on the first (visits 1 and 3) and last doses (visits 2 and 4) of each LA form.

    Time frame: Obtained at first (Visits 1 and 3) and last doses (visits 2 and 4) of each form of LA. Each visit is approximately a week apart.

07

Study locations

1 site
  • Oregon Health & Science University
    Portland, Oregon 97239, United States
08

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Jun 2018 to primary completion in Jan 2019, 7 months.

Of 20 phase 1 interventional studies under Multiple Sclerosis, Chronic Progressive, half reached primary completion within 44 months of starting (the median), counting those still running; a quarter within 17 and three quarters within 56. This study's 7 months is below that.

How these figures are worked out, and which studies are left out of them.

Registered
Mar 21, 2018
First posted
Apr 11, 2018
StartActual
Jun 8, 2018
Primary completionActual
Jan 25, 2019
CompletionActual
Jan 25, 2019
Last update
Mar 22, 2019
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Mar 22, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT03493841
Lead sponsor
Rebecca Spain
Responsible party
Rebecca Spain (Principal Investigator, Oregon Health and Science University) — Sponsor-investigator
First posted
Apr 11, 2018
Start date
Jun 8, 2018
Primary completion
Jan 25, 2019
Completion
Jan 25, 2019
Last update
Mar 22, 2019

Study contacts

Rebecca Spain, MD, MSPH
principal investigator · Oregon Health and Science University
Michelle Cameron, MD, PT, MCR
principal investigator · Oregon Health and Science University

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Mar 2019. You cannot join it, but the record below documents what was studied.

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