Pharmacological treatment in adult patients with CRPS-I: a systematic review and meta-analysis of randomized controlled trials

source extracted confidence: high 2026-04-09
#adult #anti-inflammatory-agents-non-steroidal #cyclooxygenase-2-inhibitors #diphosphonates #humans

Pharmacological treatment in adult patients with CRPS-I: a systematic review and meta-analysis of randomized controlled trials

Fassio et al., 2022 | Rheumatology (Oxford) | Meta Analysis

Citation

Fassio Angelo, Mantovani Alessandro, ... Adami Giovanni. Pharmacological treatment in adult patients with CRPS-I: a systematic review and meta-analysis of randomized controlled trials. Rheumatology (Oxford). 2022-Aug-30;61(9):3534-3546. doi:10.1093/rheumatology/keac060

Abstract

OBJECTIVE: Several pharmacological treatments have been proposed for the treatment of complex regional pain syndrome type-I (CRPS-I) in adults, but data regarding the efficacy of various agents for this disease is scarce. We performed a systematic review and meta-analysis of randomized controlled trials (RCTs) to analyse the efficacy of the various pharmacological approaches in adults with CRPS-I. METHODS: We systematically searched PubMed, Scopus, and Web of Science databases from the inception date to 30 June 2021 to identify placebo-controlled or active-controlled RCTs using bisphosphonates, ketamine, CSs, anti-epileptics, NSAIDs/COXIBs, opiates, antidepressants, scavengers/magnesium sulphate or IVIGs for the treatment of CRPS-I. The primary outcomes included changes in the visual analogue scale (VAS) or numeric rating scale (NRS) for pain before and after treatment. RESULTS: We included 20 placebo-controlled or active-controlled RCTs (including a total of 818 adults with CRPS-I) that used bisphosphonates (n = 7), ketamine (n = 2), CSs (n = 2), anti-epileptics (n = 1), NSAIDs/selective inhibitors of cyclooxygenase-2 (COXIBs) (n = 2), scavengers/magnesium sulphate (n = 5), or IVIGs (n = 1) to treat CRPS-I during a median follow-up of 26 weeks. Treatment with bisphosphonates showed a significant reduction in the values of the VAS/NRS pain scale compared with placebo or reference therapy (random effects weighted mean difference [WMD]: -23.8, 95% CI: -28.0 to -19.6; I2 = 36.4%). Treatment with ketamine also documented a reduction in the values of the VAS/NRS for pain (random effects WMD: -8.27, 95% CI: -12.9 to -3.70; I2 = 0%). Treatment with other agents did not reduce the values of the VAS/NRS assessments of pain. CONCLUSION: This systematic review and meta-analysis supports the recommendation of parenteral bisphosphonates as the first-line agent in the treatment of CRPS-I. TRIAL REGISTRATION: Open Science Framework registries, https://osf.io/et9gu/, osf.io/et9gu.

Key Findings

We included 20 placebo-controlled or active-controlled RCTs (including a total of 818 adults with CRPS-I) that used bisphosphonates (n = 7), ketamine (n = 2), CSs (n = 2), anti-epileptics (n = 1), NSAIDs/selective inhibitors of cyclooxygenase-2 (COXIBs) (n = 2), scavengers/magnesium sulphate (n = 5), or IVIGs (n = 1) to treat CRPS-I during a median follow-up of 26 weeks. Treatment with bisphosphonates showed a significant reduction in the values of the VAS/NRS pain scale compared with placebo or

Outcomes Measured

  • C-reactive protein

Population

Field Value
Population See abstract
Sample Size 7
Age Range See abstract
Condition See abstract

MeSH Terms

  • Adult
  • Anti-Inflammatory Agents, Non-Steroidal
  • Cyclooxygenase 2 Inhibitors
  • Diphosphonates
  • Humans
  • Ketamine
  • Magnesium Sulfate
  • Pain
  • Randomized Controlled Trials as Topic
  • Reflex Sympathetic Dystrophy

Evidence Classification

  • Level: Meta Analysis
  • Publication Types: Journal Article, Meta-Analysis, Systematic Review
  • Vertical: magnesium

Provenance

Source extracted via PubMed E-utilities API on 2026-04-09