Small and mixed populations
Published human work involving ibogaine has often focused on substance-use contexts, observational follow-up, or naturalistic settings rather than childhood-trauma populations. Sample sizes are commonly limited, participant characteristics vary, and study conditions are not uniform. Those features make it difficult to separate a substance effect from selection, expectancy, concurrent care, or the setting itself.
Questions about whether ibogaine treatment works need to be read against those design limits rather than reduced to a simple yes-or-no conclusion.