Long-Term Safety and Efficacy of Crisugabalin for Diabetic Peripheral Neuropathic Pain: A 52-Week, Multicenter,...

The HSK16149-201/301 trial demonstrated short-term efficacy of the GABA analog crisugabalin for diabetic neuropathic pain.

In the current study, patients in both the crisugabalin and placebo control groups of the HSK16149-201/301 trial were invited to receive 80 mg/day crisugabalin for an additional 52 weeks. The primary end point was safety. The secondary end point was pain control as measured using the Short-Form McGill Pain Questionnaire (SF-MPQ). A total of 301 patients (mean age 59.7 years and males 58.1%) were enrolled.

The rate of treatment-related adverse events (TRAEs) was 38.9% (117/301). The most frequent TRAEs were dizziness (27.2%), somnolence (8.3%), and peripheral edema (3.0%). The rate of Grade 3 or higher TRAEs was 1.7%. TRAEs led to dose reduction in 41 patients (13.6%), treatment interruption and discontinuation each in three patients (1.0%). At week 52, the mean difference in SF-MPQ pain rating index (PRI) and visual analog scale pain score from baseline was -2.5 (95% CI -2.9 to -2.0; paired t-test p < 0.0001) and -23.4 (95% CI -25.6 to -21.2; paired t-test p < 0.0001), respectively. The proportion of patients with SF-MPQ PPI score ≤ 1 increased by 19.0% over baseline (p < 0.0001).

In summary, crisugabalin at 80 mg/day was well tolerated and demonstrated sustained analgesic activities.

ClinicalTrials.gov identifier: NCT05890053.