AP -- House Democrats are questioning whether Merck and Schering-Plough made up information about a meeting of medical experts to discuss Vytorin, after lawmakers began investigating a failed study of the drug. Democratic leaders of the House Energy and Commerce Committee sent a letter to the companies Friday asking why minutes from a November meeting about the blockbuster cholesterol drug were created after the fact, in December. The five-member panel of medical advisers were told that no minutes or transcript of the meeting would be taken, the lawmakers note.