Ephedrine 8 mg dose limit, warnings against long-term intake proposed by agency.

EPHEDRINE ALKALOID PER-SERVING LIMIT OF 8 MG SUGGESTED BY FDA in a proposed rule published in the June 4 Federal Register. The rule is directed at dietary supplement products containing ephedrine alkaloids derived from raw botanicals -- products usually labeled as containing "ephedra," "Chinese ephedra" or "ma huang" that are sold for weight loss, increased energy and body building. The proposal does not apply to OTC drugs.