Natural vs Synthetic Psychoactive Substances

Three labels, used carefully

The US National Institute on Drug Abuse (NIDA) says many psychedelic drugs derive from plants and fungi, some have been used for thousands of years in traditional or religious rituals, and some are also synthetic, meaning lab-made. [1] This library uses three plain labels:

• Natural: the substance occurs in a plant, fungus or other organism.
• Semisynthetic: a laboratory substance made from, or chemically built on, a natural starting material.
• Synthetic: a substance developed in the laboratory.

These are our working labels. Each placement below is tied to a source. Where a source does not say, the page says so.

Where common examples fall

Ketamine is not a plant or fungal product, and this library never describes it as natural. Naming conventions matter: a substance is not the same as the organism it comes from. A mushroom or cactus contains a mixture of compounds, and a purified compound or a clinical product made from it is a different thing. See Traditional Preparations vs Isolated Compounds and Clinical Products and Clinical Formulations vs Nonmedical Products.

Natural does not mean safe

NIDA says effects of psychedelic and dissociative drugs are hard to predict and depend on the amount taken, a person's biology, mood, expectations and surroundings, and that contaminants or combining with other substances can produce effects that the drug alone would not. [1] Natural sources carry their own risks:

• Case reports describe serious toxicity from the natural mushroom Amanita muscaria, including a death, and the authors say its ingestion should not be considered benign. [8]
• A review of ibogaine, a compound from a natural African shrub, reports fatalities after ingestion and concern about its toxicity. [9]
• A case report describes a young man admitted in a coma after eating a Datura plant. [10]

None of these shows that natural substances are worse than lab-made ones either. NIDA also lists synthetic drugs with documented harms, such as PCP and the lab-made NBOMes, as associated with small numbers of deaths and serious effects. [1] The comparison "natural versus synthetic" cannot decide safety. The substance, the form, the person and the setting decide it. The same point is developed in Natural Is Safer and Other Safety Claims.

Products can differ from their label

Illicitly made or processed products may be contaminated with other dangerous substances, including colorless and odorless fentanyl. [1] MDMA sold illicitly has been found to contain other drugs such as ketamine and synthetic cathinones. [6] A "natural" claim on a product is a marketing claim, not evidence of safety or content. See Contamination and Adulteration.

Evidence labels

The classification above is descriptive, not evidence of benefit. Where evidence of benefit is discussed elsewhere, the library uses approved medicine, established, promising but limited, mixed, insufficient evidence, preclinical, no good evidence of benefit, evidence of harm and marketing claim. See how we label evidence. A "natural" claim on its own is a marketing claim.

Education only

This page explains labels. It gives no amounts, no sourcing, extraction or preparation information and no advice to use or to treat yourself. For a compound-level comparison see Natural vs Synthetic Compounds.