Washington ? The Food and Drug Administration said Saturday it was investigating a health care company for possible other problems following its recall of more than 40 over-the-counter infant’s and children’s liquid medications.

McNeil Consumer Healthcare, based in Fort Washington, Pa., issued the voluntary recall late Friday in the United States and 11 other countries after consulting with the FDA. The recall involves children’s versions of Tylenol, Tylenol Plus, Motrin, and Benadryl, because they don’t meet quality standards.

The FDA said it was reviewing procedures at McNeil, which appears to be the sole source of the problems.

The FDA called the potential for serious medical problems “remote,” but it advised consumers to stop using the medicine as a precaution. It said a health care professional should be consulted if a child has recently taken any of the recalled products and is exhibiting unexpected symptoms.