Short answer: The FDA advises pregnant women, and women who could become pregnant, not to take vinpocetine, based on findings that it may cause miscarriage or harm fetal development.
Why this warning is stated with unusual directness
Naming the specific concern — miscarriage or harm to fetal development — reflects a genuinely serious, direct disclosure rather than a vague regulatory caveat.
Why this warning extends beyond just pregnant women
Women who could become pregnant — this broader population is specifically named, not just those currently pregnant, reflecting the FDA's own precautionary framing.
⚠️ Worth knowing: the FDA has also concluded that vinpocetine does not meet the legal definition of a dietary ingredient.