Clinical trial Recruiting at 14 sites Phase2; Phase3 Interventional Ages 18 and up

Acetyl-L-carnitine to slow functional decline in ALS

Official title: A Randomized, Phase II/III Trial on the Biological and Clinical Effects of Acetyl-L-carnitine in ALS

Run by Mario Negri Institute for Pharmacological Research · NCT06126315 · Data updated 2026-11-12

This trial tests whether two doses of acetyl-L-carnitine can slow loss of independence in adults with recent-onset ALS.

Quick facts

PhasePhase2; Phase3
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment246 (estimated)
SponsorMario Negri Institute for Pharmacological Research
Academic / other
Locations19 sites (Sydney, Australia and 18 other locations)
StatusRecruiting
StartedMarch 26, 2025
Main results expectedApril 2027
Study endsSeptember 2027
Registry record updatedOctober 6, 2026
Trial IDNCT06126315 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults diagnosed with ALS per Gold Coast criteria within 24 months, with FVC ≥80%, documented functional decline, intact cognition, and on stable riluzole are the ideal candidates.

Probably not a fit

People with more advanced disease, low respiratory function (FVC <80%), very long disease duration, or significant cognitive impairment are unlikely to meet eligibility or benefit from this trial.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a multicenter, randomized, double-blind, placebo-controlled Phase II/III trial comparing two doses of acetyl-L-carnitine (1.5 g/day and 3 g/day) against placebo in people with ALS. The primary outcome is progression of functional disability measured by the ALSFRS-R, with secondary outcomes including FVC decline, quality of life (ALSAQ-40), cognition (ECAS), survival without tracheostomy, and biomarker changes. Eligible participants are adults meeting Gold Coast diagnostic criteria with disease duration under 24 months, preserved respiratory function, documented recent progression, and stable riluzole treatment. The trial is conducted at specialist ALS centers in Italy and at Concord Hospital in Sydney, Australia.

Why it matters

Potential benefit: If successful, the treatment could slow functional decline and help people with ALS maintain independence longer.

How similar studies have gone: Preclinical work and small clinical studies of acetyl-L-carnitine suggest potential neuroprotective effects, but clinical evidence in ALS to date is limited and inconclusive.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Age 18+;
2. ALS diagnosis according to the Gold Coast Criteria;
3. Disease duration \< 24 months from symptom onset, as indicated by limb weakness or bulbar symptoms, at the randomization/baseline visit\*;
4. Self-sufficiency \[Satisfactory bulbar and spinal function (score 3+ on the ALSFRS-R for swallowing, cutting food and handling utensils, and walking)\];
5. Satisfactory respiratory function (FVC ≥80% of predicted);
6. Documented progression of symptoms as measured by the ALSFRS-R scale. Disease progression rate (DFS) must be\>= 0.33. DFS =(48- ALSFRS-R at screening)/months from onset to screening.
7. Ability to understand and comply with the study requirements;
8. Ability to give written informed consent personally or, as an alternative, via a legally authorized representative;
9. Treatment with riluzole 50 mg twice/day for at least 4 weeks prior to randomization visit;
10. Intact cognitive function, again determined by the Principal Investigator.

    * The qualifying first symptoms of ALS are limited to manifestations of weakness in extremity, bulbar, or respiratory muscles. Cramps, fasciculations, or fatigue should not be taken in isolation as a first symptom of ALS.

Exclusion Criteria:

1. Antecedent polio infection or other active infection;
2. Motor neuron disease (MND) other than ALS;
3. Involvement of other systems possibly determining a functional impairment (as measured by the endpoints) for the entire duration of the study;
4. Other severe clinical conditions (e.g., cardiovascular disorders, neoplasms) with an impact on survival or functional disability in the next 12 months;
5. Previous use of ALCAR for any reason;
6. Poor compliance with previous treatments;
7. Other experimental treatments in the three months prior to the screening visit (if a subject is receiving another experimental drug, a 3-month wash-out period before participating in the present clinical trial will be required);
8. Women who are lactating or able to become pregnant (e.g. who are not post-menopausal, surgically sterile, or using inadequate birth control) and men unable to practice contraception for the duration of the treatment and three months after its completion;
9. Inability to understand and comply with the study requirements;
10. Unwillingness or inability to take riluzole.

Where it's running

  • Concord Hospital
    Sydney, Australia, Australia
    Recruiting
  • Fondazione Serena ONLUS Centro Clinico NEMO Brescia
    Brescia, Brescia, Italy
    Recruiting
  • Azienda Socio Sanitaria Territoriale Papa Giovanni XXIII, Dipartimento di Neurologia
    Bergamo, Italy, Italy
    Recruiting
  • Istituto Auxologico Italiano, IRCCS Dipartimento di Neurologia
    Milan, Italy, Italy
    Recruiting
  • Azienda Ospedaliera Universitaria Federico II Di Napoli
    Naples, Italy, Italy
    Recruiting
  • Azienda Ospedaliero-Universitaria Maggiore della Carità
    Novara, Italy, Italy
    Recruiting
Show 13 more locations
  • Azienda Ospedale-Università di Padova, Unità di Neurologia Clinica
    Padova, Italy, Italy
    Recruiting
  • Fondazione Serena ONLUS-Centro Clinico NEMO Trento
    Pergine Valsugana, Italy, Italy
    Recruiting
  • Fondazione Serena ONLUS - Centro Clinico NeMO Ancona
    Torrette, Italy, Italy
    Recruiting
  • Fondazione Serena ONLUS centro clinico NEMO
    Milan, Milano, Italy
    Recruiting
  • AOU di Modena Nuovo Ospedale Civile S. Agostino Estense di Modena - Ospedale di Baggiovara
    Modena, Modena, Italy
    Recruiting
  • Fondazione Mondino Istituto Neurologico Nazionale a Carattere Scientifico IRCCS
    Pavia, Pavia, Italy
    Recruiting
  • Azienda Ospedaliero Universitaria Pisana
    Pisa, Pisa, Italy
    Recruiting
  • Azienda Ospedaliero-Universitaria Policlinico Umberto I - Università di Roma "La Sapienza"
    Roma, Roma, Italy
    Recruiting
  • Azienda Ospedaliera Universitaria "Luigi Vanvitelli", Dipartimento di Scienze mediche e chirurgiche avanzate
    Naples, Italy, Italy
    Not yet recruiting
  • A.S.P. Palermo, Villa delle Ginestre Hospital
    Palermo, Italy, Italy
    Not yet recruiting
  • Azienda Ospedaliera di Perugia
    Perugia, Italy, Italy
    Not yet recruiting
  • Azienda Ospedaliero Universitaria Pisana, Dipartimento di Medicina Clinica e Sperimentale
    Pisa, Italy, Italy
    Not yet recruiting
  • San Camillo Forlanini Hospital, Center for Neuromuscolar and Neurological Rare Diseases, Unit of Neurology and Neurophysiopathology
    Roma, Italy, Italy
    Not yet recruiting

Study contacts

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.