Cost-Effectiveness of Capsaicin 8% Patch Compared with Pregabalin for the Treatment of Patients with Peripheral Neuropathic Pain in Scotland

PLoS One. 2016 Mar 16;11(3):e0150973. doi: 10.1371/journal.pone.0150973. eCollection 2016.

Abstract

We evaluated the cost-effectiveness of capsaicin 8% patch (QUTENZA™) versus pregabalin in patients with PNP from the perspective of the National Health Service (NHS) and Personal and Social Services in Scotland, UK. A decision-tree cost-effectiveness model was developed for non-diabetic patients with peripheral neuropathic pain (PNP) who were pregabalin-naïve and had not achieved adequate pain relief or tolerated conventional first- or second-line treatments. Patients entering the model received either a single application of capsaicin 8% patch or titrated daily dosing with pregabalin; after 8 weeks patients were classified as responders, non-responders, or were assumed to discontinue treatment due to intolerable adverse events. Responders continued to receive baseline treatment at intervals observed in clinical practice. Non-responders and those who discontinued treatment were assumed to receive last-line therapy (duloxetine). The base-case time horizon was 2 years. Model inputs for effectiveness, discontinuations and health-state utilities were taken from a head-to-head non-inferiority study (ELEVATE, NCT01713426). Other inputs were obtained from published sources or clinical expert opinion. Costs were expressed in GBP 2013/14. Results were presented as incremental cost-effectiveness ratios (ICER), i.e. cost per quality-adjusted life-year (QALY) gained. Model assumptions were tested with scenario analyses. Parameter uncertainty was tested using one-way and probabilistic sensitivity analyses. Compared with dose-optimized pregabalin, capsaicin 8% patch was the dominant treatment strategy (total cost difference, -£11; total QALY gain, 0.049). Capsaicin 8% patch was also the dominant treatment strategy versus pregabalin in 6 out of 7 scenario analyses. The model was most sensitive to variation in time to capsaicin 8% patch retreatment (maximum ICER, £7,951/QALY at lower-bound 95% confidence interval). At a willingness-to-pay threshold of £20,000/QALY, the probability of capsaicin 8% patch being cost-effective versus pregabalin was 97%. Capsaicin 8% patch is a cost-effective treatment option compared with dose-optimized pregabalin in patients with PNP who have failed one or more previous systemic treatments.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Administration, Topical
  • Analgesics / administration & dosage*
  • Analgesics / economics
  • Capsaicin / administration & dosage*
  • Capsaicin / economics
  • Cost-Benefit Analysis*
  • Humans
  • Peripheral Nervous System Diseases / drug therapy*
  • Pregabalin / administration & dosage*
  • Pregabalin / economics
  • Scotland
  • Sensory System Agents / administration & dosage*
  • Sensory System Agents / economics

Substances

  • Analgesics
  • Sensory System Agents
  • Pregabalin
  • Capsaicin

Grants and funding

Astellas funded the analyses performed by Abacus International and the medical writing assistance performed by Bioscript Medical. Astellas provided support in the form of salaries for authors CM, SP and CP. Employees of Astellas participated in the study design, analysis, decision to publish, and preparation of the manuscript, as articulated in the ‘author contributions’ section.