Unapproved cannabidiol tincture. This product is among those examined by the US Food and Drug Administration (FDA) to assess the claims being made. The FDA regulates the sale of products as drugs with claims to treat or cure various disorders, issuing warning letters where the claims are not justified. Cannabidiol (CBD) is a cannabinoid chemical found in cannabis plants. Cannabis-derived drugs may be medically useful due to their ability to relieve pain and nausea, increase appetite and control muscle spasms. Photographed in 2016.