Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Tell your caregivers at once if you have:
pain, burning, irritation, discoloration, or skin changes where the injection was given;
sudden numbness, weakness, or cold feeling anywhere in your body;
slow or uneven heart rate;
blue lips or fingernails, mottled skin;
little or no urination;
trouble breathing;
problems with vision, speech, or balance; or
severe headache, blurred vision, pounding in your neck or ears.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Norepinephrine side effects (more detail)
