Ibogaine is an indole alkaloid associated with plants in the Tabernanthe iboga family. It has a long history of ceremonial and cultural use in parts of Central Africa and a separate, more recent history of interest in substance-use contexts. A concise reference on the compound’s identity and history appears in Wikipedia’s ibogaine overview.
After ingestion, ibogaine is metabolized in part into noribogaine. The two compounds have different pharmacological profiles and time courses. Ibogaine is often discussed for its acute psychoactive effects; noribogaine is often discussed because it may remain present longer and interacts with several biological targets. Neither description establishes a treatment effect for alcohol use disorder.
At a broad level, researchers have investigated interactions involving serotonin transport, opioid receptors, NMDA-related signaling, nicotinic receptors, and other systems. This multi-target activity is one reason simple explanations can be misleading: a proposed mechanism is not the same thing as a demonstrated clinical outcome. For a wider orientation to alcohol-focused questions, the main Emberway overview of experimental ibogaine approaches sets the topic alongside the uncertainties that matter.