The FDA has informed companies that manufacture or distribute trimethobenzamide suppositories for relief of nausea to stop making and marketing them. It has also withdrawn the New Drug Application (NDA) for Tigan suppositories originally granted in the 1970′s.
FDA has found no evidence that the trimethobenzamide containing suppositories are effective.
The suppositories are currently on the market under such names as Tigan, Tebamide, T-Gen, Trimazide, and Trimethobenz.
The ruling does not affect oral capsules or injectable drugs containing trimethobenzamide, which have been FDA approved.
The Federal Register Notice published on April 7, 2007 completes a long process involving trimethobenzamide suppositories which began in 1979 when the FDA found that there was no evidence for their effectiveness treating nausea and vomiting in either adults or children. At that time one of the companies holding an NDA for the suppositories requested a hearing. Over the years, manufacturing companies were acquired by others and the hearing issue was not resolved, nor was additional information on effectiveness received.
At this point, the FDA has withdrawn the NDA and told any company that is marketing trimethobenzamide suppositories to stop doing so because there is no evidence that they are effective and, therefore, not FDA approved. The Federal Register Notice applies to “any drug product that is identical, related, or similar to Tigan Suppositories and is not the subject of an approved NDA.”
The FDA tells consumers who have purchased or are using the suppositories to discuss the issue with their health care provider.


