Cost-benefit analysis of riluzole for the treatment of amyotrophic lateral sclerosis.

We conducted a cost-benefit analysis of riluzole therapy in patients with amyotrophic lateral sclerosis (ALS; motor neuron disease; Lou Gehrig's disease). The survival of patients with ALS increased by around 3 months as a result of riluzole therapy, from 3 to 3.25 years. A 3-month delay in hospitalisation was also expected as a result of riluzole therapy, resulting in a saving of $US40 per patient (1996 values). This gain was opposed by the additional costs per patient of bi-monthly serum ALT monitoring ($US234), 2 days of extra day-hospital observation ($US369) and other medical costs ($US79), as well as extra outpatient visits ($US26) and costs of medication other than riluzole ($US90), resulting from increased longevity. Using riluzole (at a cost of $US2247 per patient) resulted in an extra burden of $US757 on health services for the gain of an extra 3 months of life expectancy. Thus, health-service costs per life-year gained were $US12,013. Despite the increase in health-service costs as a result of increased longevity, the overall resource benefits to society from using riluzole amounted to $US2884 due to increased productivity benefits, giving a benefit: cost ratio of 1.28:1. Total benefits to society, including a valuation of 3 extra months of life ($US3599), amounted to $US6483, giving a benefit: cost ratio of 2.89:1. Therefore, from a societal perspective, the potential benefits of riluzole in patients with ALS clearly exceed costs.