In conclusion, corticosteroids are a class of medications with wide-ranging clinical uses and wellstudied effects on the immune system. ALS progression is associated with changes in immune system function, with the early disease states associated with anti-inflammatory immune markers and the advanced disease states associated with
pro-inflammatory immune markers. Although treatment with corticosteroids may cause a transient change in some immune markers, both preclinical and clinical trials have failed to show any clinical benefit in ALS. Multiple individual PALS
have self-reported improvement in weakness with corticosteroid treatment, but these cases have unclear generalizability and are limited by an uncertain ALS diagnosis, limited clinical data during the disease course, and heterogeneity of glucocorticoid type and dose. Although affordable and widely available, corticosteroids can have numerous side effects, and their risks are greater for higher doses or prolonged treatment. Therefore, we cannot recommend corticosteroids at this time as a way to slow ALS progression. Further research into immune system modulation in ALS is ongoing at many research centers internationally.
Patient trials
Vitamin C
Vitamin C is safe and inexpensive. As an antioxidant, it has a plausible mechanism for influencing the course of neurodegenerative diseases. Two flawed preclinical studies by the same group showed benefits in a mouse model of familial ALS. There are two case reports in which it was associated with improvement. However, there are multiple possible explanations for the improvement in these cases. It is not clear which if any dose of vitamin C might be beneficial for PALS; a small clinical trial using oral vitamin C at 2,000 mg daily was unable to demonstrate benefits in PALS. Based on this negative trial, we currently advise against using vitamin C to treat ALS.
Azathioprine
As an immunosuppressant drug, AZA has a plausible mechanism for slowing the progression of ALS. However, there is no pre-clinical data to support its use and two clinical trials did not support efficacy. There are 2 published cases in which
ALS reversals occurred on AZA, but it is not clear to us that the AZA actually contributed to the ALS improvements. One of these patients also had myasthenia gravis, which is known to cause reversible weakness and therefore complicates the measurement of ALS. The other patient was taking many different medications and supplements along with AZA. AZA has very serious, potentially fatal, both short and long-term risks associated with its use and requires medical monitoring. Based on the
available data, we do not advise the use of AZA as an ALS treatment
L-Carnitine
There are good theoretical mechanisms for carnitines, some pre-clinical evidence for
LC and ALCAR, and a single clinical trial that suggested ALCAR could slow disease progression in PALS. All three carnitines appear to be well-tolerated, generally safe, and inexpensive. We believe that there is a need for future clinical trials of carnitines in PALS to further elucidate their efficacy. Until there is further data, we cannot endorse any of these supplements as a definite way to slow ALS progression; however, oral ALCAR at 1000mg three times daily (3000 mg total daily dose) appears to be a theoretically promising supplement available for PALS whom would like to self-experiment.
Vitamin E
Vitamin E (a-tocopherol) is perhaps the most studied supplement in the history of ALS and was taken by one of the most famous ALS patients. Vitamin E has mechanistic potential in ALS as an antioxidant but appears in the SOD1 mutant mouse model to only have an effect on delaying disease onset. This bears out in human populations as large prospective cohorts show that long-duration vitamin E supplementation may decrease the risk of ALS, but randomized clinical trials show that even high dose vitamin E does not benefit the disease once ALS has been diagnosed. Although it is inexpensive and safe, we do not recommend vitamin E to slow, stop or reverse ALS
based on the lack of efficacy in clinical trials.
Glutathione
As an ALS treatment, glutathione and cysteine-containing supplements that increase glutathione appear reasonably safe, and they have a plausible mechanism, positive preclinical data and 2 interesting case reports. Unfortunately small clinical trials of glutathione itself and of acetylcysteine showed no significant benefit. Given these negative clinical trials, we do not advise PALS to take glutathione or cysteine-containing supplements for their ALS at this time.
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Perampanel
Perampanel is a drug currently used to treat seizures which has a mechanism of action that theoretically could be useful in treating patients with ALS. A single flawed study in a mouse model of ALS showed some benefits of perampanel, but data from humans with ALS is quite limited. Due to the lack of data in PALS, the failure of the closely related drug talampanel in ALS clinical trials, and several serious safety concerns, including an increased fall risk and serious psychiatric adverse effects, we cannot recommend off-label use of perampanel for ALS at this time. We look forward to the results of the on-going clinical trials of perampanel in ALS and we will update our TOE grades accordingly when these results become available.
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Penicillin G/Hydrocortisone
In our opinion, there is no convincing evidence that GABA overload plays a role in ALS progression. PNG/HC has other theoretical mechanisms by which it could slow ALS progression, but previous human trials involving steroids and a trial of a b lactam with more potent effects on glutamate did not help. We have not been able to confirm the diagnoses, nor the improvements described in the case series of 3 PALS taking PNG/HC; however, even if these treatment effects were real, these improvements were transient and quickly became unresponsive to treatment. Unless the ongoing placebo-controlled trial shows objective and sustained clinical improvements, we do not recommend that PALS take this expensive and risky combination of penicillin G and hydrocortisone.
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