Comparison of Sodium Lactate Infusion and Carbon Dioxide Inhalation Panic Provocation Tests: A Meta-analysis.
Level 1 - systematic review of randomized trials
Systematic review and meta-analysis of controlled provocation studies.
PubMed 34666404 · doi:10.1055/a-1589-6049
What was done
A systematic literature search and meta-analysis were conducted to compare the effect sizes of sodium lactate (NaL) infusion and carbon dioxide (CO2) inhalation panic provocation tests. The rate of acute panic attacks in individuals with panic disorder was compared to healthy controls. Individual study odds ratios were extracted and pooled using a random-effects model.
What was found
Both NaL infusion and CO2 inhalation significantly increased panic attack rates in individuals with panic disorder relative to healthy controls. The pooled effect size for NaL infusion (OR = 25.13, 95% CI = 15.48–40.80) was significantly greater than that for CO2 inhalation (OR = 10.58, 95% CI = 7.88–14.21).
Why it matters
This meta-analysis quantifies and contrasts the diagnostic and experimental power of the two leading chemical panic provocation challenges, indicating that sodium lactate acts as a significantly stronger stimulus for panic induction.
Limits
The abstract does not report the number of included studies, total participant counts, or demographic characteristics. Heterogeneity across challenge administration protocols (e.g., CO2 concentration, single-breath vs. continuous inhalation, lactate infusion rates) and safety or adverse event profiles are not detailed.
Cited by
- supports Injecting people with lactate can trigger panic attacks, and in individuals with PTSD, lactate injection can reawaken traumatic memories.