Synthroid is a drug used to treat hypothyroidism, a condition where the body doesn't make enough thyroid hormone.
Patients are generally on thyroid-drug therapy for life.
Knoll maintains it did nothing wrong but says it settled to avoid a long legal battle. The suit began after Knoll suppressed research that showed Synthroid was no better than two cheaper, generic alternatives, reports this wire story on ABC News . A researcher finally had the study published in the Journal of the American Medical Association in April 1997. Cost isn't the only factor in deciding how to treat hypothyroidism.