Get emergency medical help if you have any of these signs of an allergic reaction to Macrobid: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
diarrhea that is watery or bloody;
sudden chest pain or discomfort, wheezing, dry cough or hack;
new or worsening cough, trouble breathing;
fever, chills, body aches, tiredness, unexplained weight loss;
numbness, tingling, or pain in your hands or feet;
liver problems--nausea, upper stomach pain, itching, tired feeling, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes); or
lupus-like syndrome--joint pain or swelling with fever, swollen glands, muscle aches, chest pain, vomiting, unusual thoughts or behavior, and patchy skin color.
Serious side effects may be more likely in older adults and those who are ill or debilitated.
Common Macrobid side effects may include:
headache, dizziness;
gas, upset stomach;
mild diarrhea; or
vaginal itching or discharge.
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.
 Macrobid side effects (more detail)
