Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have a serious side effect such as:
hearing problems, ringing in your ears, or a feeling of fullness in the ears;
spinning sensation, nausea, feeling like you might pass out;
loss of balance or coordination, trouble walking;
numbness or tingly feeling under your skin;
muscle twitching, seizure (convulsions);
urinating less than usual or not at all;
drowsiness, confusion, mood changes, increased thirst, loss of appetite, nausea and vomiting;
swelling, weight gain, feeling short of breath;
weak or shallow breathing; or
severe stomach cramps, diarrhea that is watery or bloody.
Less serious side effects may include:
mild nausea, vomiting; or
mild diarrhea.
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.
 Neomycin side effects (more detail)
