What are the side effects of norfloxacin?

Seek emergency medical care by calling 911 if you experience any of these potentially serious side effects of norfloxacin (Noroxin):
  • symptoms of an allergic reaction, characterized by breathing difficulty, hives, rash, itching or swelling in your face, lips, tongue or throat
  • seizures
  • fainting
  • confusion
  • rapid, irregular or pounding heartbeat
  • shortness of breath
Call your doctor right away and get medical attention if you have any of these serious side effects or symptoms:
  • severe headaches
  • dizziness
  • hallucinations
  • anxiety
  • restlessness
  • unusual thoughts or behavior, including not trusting others or feeling that others want to harm you
  • symptoms of tendonitis, tendon rupture or joint problems, especially in your ankles or arms, including a snapping or popping sound, sudden pain, bruising, stiffness, loss of movement or swelling
  • hoarseness
  • severe episodes of bloody or watery diarrhea
  • stomach cramps
  • pain in the upper part of your stomach
  • loss of appetite
  • pain, burning, tingling, numbness or weakness in your arms, hands, legs or feet
  • urinating infrequently or not at all
  • dark-colored urine
  • clay-colored stools
  • yellowing of the eyes or skin
  • pale skin
  • blistering, peeling, or red skin
  • unusual bruising or bleeding
  • muscle pain or weakness
  • uncontrollable shaking
  • fever
  • swollen glands
  • sore throat
Other side effects that may be bothersome but are less likely to be serious include:
  • nausea
  • vomiting
  • mild stomach pain or cramps
  • heartburn
  • diarrhea
  • constipation
  • feeling restless or anxious
  • mild headache
  • dizziness
  • sleep problems, including nightmares or insomnia,
  • vaginal itching or discharge
  • mild itching
Talk to your doctor if these side effects are severe or persistent.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.