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WASHINGTON — Federal health officials are warning consumers that the weight- loss pills Alli and Xenical may cause severe liver damage in rare cases.
The Food and Drug Administration said Wednesday that it has added a warning about the risk to the label of the drug Alli, which is sold over the counter by GlaxoSmithKline.
The prescription version, Xenical, is manufactured and marketed by Roche.
The FDA identified 13 instances of liver damage associated with the drugs. A causal effect between the drugs and the problem has not been established.
The FDA urged doctors and patients to watch for signs of liver injury, including itching, yellow eyes and skin, and loss of appetite.
