U.S. Marshals, along with U.S. Food and Drug Administration (FDA) investigators, seized more than 250,000 units of dietary supplements and bulk dietary ingredients that are or contain kratom, including 1,000 kilograms of bulk kratom.

Mitragyna speciosa, or Kratom, is a plant that grows in certain Southeast Asian countries and has been indicated to have narcotic and stimulant-like effects.

The complaint alleges there isn’t enough information to provide assurance about the safety of kratom and consuming kratom can lead to serious health issues including respiratory depression, vomiting, nervousness, weight loss and constipation, the complaint states.

The compliant also says withdrawal symptoms may include hostility, aggression, excessive tearing, aching of muscles and jerky limb movements.