operating machinery, or driving. the most common side effect is low blood sugar. symptoms may include dizziness, sweating, confusion, and headache. severe low blood sugar can be life-threatening. other common side effects include low potassium in your blood and injection site reactions. get medical help right away if you experience trouble with breathing serious allergic reactions like swelling of your face tongue, or throat, sweating, extreme drowsiness dizziness, or confusion. now i know about novologĀ®. taken by millions since 2001. vo: ask your health care provider about adding novologĀ®. it can help provide the additional control you may need. and we're back from philadelphia tonight.