SAFETY CONSIDERATIONS: Serious infections have happened in patients taking HUMIRA. These infections include tuberculosis (TB) and infections caused by viruses, fungi, or bacteria that have spread throughout the body. Some of these serious infections have been fatal. Patients treated with HUMIRA also may be at risk for other serious side effects including certain types of cancers, allergic reactions, hepatitis B virus reactivation, nervous system problems, blood problems, heart failure, and certain immune reactions, including a lupus-like syndrome.