The Food and Drug Administration has issued a warning about companies selling fake drugs that claim to either treat or prevent coronavirus.

The FDA says it sent warning letters Monday to seven companies for selling unapproved drugs.

The FDA says these products "pose significant risks to patient health.”

The FDA hasn't approved any drugs to treat the virus, although many companies continue working on vaccines and treatment options.

The FDA and FTC jointly issued warning letters to Vital Silver, Quinessence Aromatherapy Ltd., Xephyr, LLC doing business as N-Ergetics, GuruNanda, LLC, Vivify Holistic Clinic, Herbal Amy LLC, and The Jim Bakker Show. The products cited in the warning letters are teas, essential oils, tinctures and colloidal silver.