What is Riluzole

Riluzole is the only treatment proven to extend survival in people with ALS based on the results of two landmark clinical trials of more than 1100 people.1,2

Results of the two pivotal studies show: 

  • Study 1: Riluzole 50 mg BID reduced the risk of death or tracheostomy by 38.6% (p=0.014) compared to placebo at 12 months of treatments1
  • Study 2: Riluzole 50 mg BID reduced the risk of death or tracheostomy by 35% (p=0.002) compared to placebo at 18 months of treatment2

Additional analysis of the two pivotal trials shows that at study enrollment, the majority of patients had stage 3 (47%) or 4 (16%) ALS based on El Escorial criteria.3 Clinical guidelines recommend beginning riluzole therapy as soon as possible following symptom onset and diagnosis to delay motor neuron degeneration.4,5 The mechanism by which riluzole exerts its therapeutic effects in patients with ALS is unknown.5

Estimated El Escorial Stage at Enrollment of Pivotal Trials( N=959)

Estimated El Escorial Stage at Enrollment of Pivotal Trials( N=959)
Stage and Description

Click here to learn more about TIGLUTIK® (riluzole) – the only formulation of riluzole indicated for both oral and PEG tube administration.

  1. Bensimon G, N Engl J Med. 1994;330:585–91.
  2. Lacomblez L, Lancet.1996;347:1425–31.
  3. Fang T, Lancet Neurol. 2018;17:416–22.
  4. Miller RG, Academy of Neurology. Neurology. 2009;73:1218–26.
  5. Andersen PM, Eur J Neurol. 2012;19:360–75.
  6. TIGLUTIK® (riluzole) [package insert]. Berwyn, PA: ITF Pharma; March 2020.


TIGLUTIK is indicated for the treatment of patients with amyotrophic lateral sclerosis (ALS).

Important Safety Information


TIGLUTIK is contraindicated in patients with a history of severe hypersensitivity reactions to riluzole or to any of its components.

Warnings and Precautions

TIGLUTIK can cause liver injury and there have been cases of drug-induced liver injury, some of which were fatal, in patients taking riluzole. Asymptomatic elevations of hepatic transaminases have been reported and, in some patients, have recurred upon re-challenge with riluzole. Maximum increases in ALT occurred within 3 months after starting riluzole. Monitor patients for hepatic injury every month for the first 3 months of treatment, and periodically thereafter; TIGLUTIK should be discontinued if there is evidence of liver dysfunction, for example, elevated bilirubin. Use of TIGLUTIK with other hepatotoxic drugs may increase the risk for hepatotoxicity.

TIGLUTIK can cause neutropenia. Cases of severe neutropenia (absolute neutrophil count less than 500 per mm3) within the first 2 months of riluzole treatment have been reported. Advise patients to report febrile illnesses.

TIGLUTIK can cause interstitial lung disease, including hypersensitivity pneumonitis. Discontinue TIGLUTIK immediately if interstitial lung disease develops.

Adverse Reactions

The most common adverse reactions (incidence greater than or equal to 5% and greater than placebo) of TIGLUTIK were oral hypoesthesia (29%), asthenia (19%), nausea (16%), decreased lung function (10%), hypertension (5%), and abdominal pain (5%).

Coadministration of TIGLUTIK with strong or moderate CYP1A2 inhibitors, such as ciprofloxacin, enoxacin, fluvoxamine, methoxsalen, mexiletine, oral contraceptives, thiabendazole, vemurafenib, and zileuton, may increase the risk of TIGLUTIK-associated adverse reactions. 

Coadministration of TIGLUTIK with CYP1A2 inducers may result in decreased efficacy of TIGLUTIK.

Use in Specific Populations

Patients with mild or moderate hepatic impairment (Child-Pugh’s score A or B) had increases in AUC compared to patients with normal hepatic function. Thus, patients with mild or moderate hepatic impairment may be at increased risk of adverse reactions. Use of TIGLUTIK is not recommended in patients with baseline elevations of serum aminotransferases greater than 5 times the upper limit of normal or evidence of liver dysfunction.

Japanese patients are more likely to have higher riluzole concentrations, and thus may be at a greater risk of adverse reactions.

Please see accompanying prescribing information.

Intended for U.S. Residents Only

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