WASHINGTON — The Food and Drug Administration announced Tuesday it is blocking imports of the medicinal drug L-tryptophan, linked to a nationwide outbreak of a blood disorder that killed at least one person.
The action, which started in late November, follows the FDA's nationwide recall of non-prescription supplements of the amino acid used for sleeping disorders, premenstrual syndrome, depression and stress.
The FDA said it "imposed an automatic detention at U.S. ports on all L-tryptophan tablets, capsules, caplets and powders as well as on bulk shipments of L-tryptophan that are used in the production of these products."
The death of a 58-year-old New York state woman has been blamed on the blood disorder eosinophilia-myalgia syndrome, linked to use of the medicinal drug, the FDA said. Several deaths, including one in Minnesota, are under investigation, the agency said.