Evaluation of IV AMBTX-01 (Neridronate) for Treatment of CRPS Type 1 (CRPS-RISE)

This is a multicenter, randomized, triple-blind, controlled trial, to assess the efficacy, safety, and tolerability of neridronate 400 mg IV in adult participants with the warm subtype of Complex Regional Pain Syndrome Type 1 (CRPS-1) and a positive triple phase bone scan (TPBS). The total planned trial duration for each participant will be approximately up to 18 weeks and will include: * Screening period of 2 up to 6 weeks * Treatment period on Days 1, 4, 7, and 10 * Post-treatment follow-up through week 12