Stop taking this medicine and tell the doctor immediately if: The patient experiences allergic reactions such as skin rash or itching, sometimes with breathing problems or swelling of the lips, tongue, throat or face.
The patient experiences any skin rash or reaction. Symptoms of serious skin reactions may include skin reddening, rash, blisters, and separation of the upper surface of the skin from the lower layers. These serious skin reactions are rare, but can occur even if the patient has taken this medicine in the past without any problems.
The patient experiences mouth ulcers.