A cost-effectiveness analysis of the effect of pregabalin versus usual care in the treatment of refractory neuropathic pain in routine medical practice in Spain.

OBJECTIVE: The objective of this study was to estimate the cost-effectiveness of pregabalin vs usual care (UC) in outpatients with refractory neuropathic pain (NeP), treated according to routine medical practice in primary care settings in Spain. METHODS: Patients were extracted from a 12-week noninterventional prospective study conducted to ascertain the costs of NeP. Pairs of pregabalin-naïve patients receiving UC or pregabalin, matched by age, gender, pain intensity, and refractory to previous treatment, were selected in a 1:1 ratio. Refractory was considered a patient with actual pain (scoring >40 in a 100 mm in a pain visual analog scale) after receiving a course of a standard analgesic, at its recommended doses. Perspectives of the Spanish National Healthcare System and society were included in the analysis. Effectiveness was expressed as quality-adjusted life-year (QALY) gain. Results of the cost-effectiveness analysis were expressed as an incremental cost per QALY (ICER) gained. Probabilistic sensitivity analysis using bootstrapping techniques was also carried out. RESULTS: A total of 160 pairs were extracted. Compared with UC, pregabalin was associated with significantly higher QALY gain; 0.0374 ± 0.0367 vs 0.0224 ± 0.0313 (P < 0.001). Despite drug acquisition costs being higher for pregabalin (€251 ± 125 vs €104 ± 121; P < 0.001), total and health care costs incurred for pregabalin were similar in both groups; €1,335 ± 1,302 vs €1,387 ± 1,489 (P = 0.587) and €529 ± 438 vs €560 ± 672 (P = 0.628), respectively, yielding a dominant ICER for both total and health care costs in the base case scenario; 95% confidence intervals, respectively, dominant to €17,268, and dominant to €6,508. Sensitivity analysis confirmed results of the basecase scenario. CONCLUSION: This study showed that pregabalin may be cost-effective in the treatment of refractory NeP patients when compared with UC in routine medical practice in Spain.