A panel of doctors is calling on the FDA to put restrictions on two well-known asthma drugs.The advisory panel says that people with asthma should not take Foradil or Serevent. Two other drugs used to treat asthma, Advair and Symbicort, are still OK, according to the panel.Dr. Jerome Weiner, the chairman of internal medicine at Good Samaritan Hospital, says Foradil or Serevent should not be used because they lack an ingredient that the other two medications have. He says without the extra ingredient, inflammation may occur, which could lead to an asthma attack.Dr. Weiner says anyone who is taking the prescriptions in question should not stop taking them, but should contact their doctor.