Shanghai, China ? China’s capital banned 10 types of drugs for exaggerated effectiveness, a newspaper reported Friday, amid rising concerns of fake and tainted products in China’s food and drug supply chains.

While the drugs were genuine, the results they claimed to produce in fighting high blood pressure, diabetes and other ailments couldn’t be supported in clinical testing, the Beijing News reported.

Stores in the city have been told to stop selling them and media outlets that carried their advertising were told to print retractions, the paper said. The orders were the first application of a new law on drug advertising, it said.

The announcement came a day after the United States banned farmed seafood from China, adding to a growing list of tainted and defective Chinese products that could pose health risks.

The U.S. Food and Drug Administration said repeated testing had turned up contamination with drugs not approved in the U.S. for use in farmed seafood, although officials said there have been no reports of illnesses.

Reached Friday by telephone, Chinese Commerce Ministry spokesman Wang Xinpei said he was still looking into the ban and had no immediate comment.

On Thursday, Wang told reporters at a news conference that Chinese exports were safe, in a rare direct commentary on rising international fears over Chinese products.

The FDA said sampling of Chinese imported fish between October and May repeatedly found traces of the antibiotics nitrofuran and fluoroquinolone, as well as the antifungals malachite green and gentian violet. The FDA will allow individual shipments of the five seafood species into the country if a company can show the products are free of residues of these drugs.