Symptoms of overdose can be similar to the medication’s side effects, but are usually more severe. Patients exhibiting any of these signs or symptoms should contact their physician immediately:

• Decreased urine output and swelling of the feet, ankles and legs. This which could indicate acute renal failure.
  
  
• Gastrointestinal discomfort.
  
  
• Unusually high body temperature.
  
  
• Ringing or buzzing in the ears or ear pain.
  
  
• Rapid breathing, confusion or lethargy, which could indicate metabolic acidosis (accumulation of acids in the body) with respiratory alkalosis (alkalinity of the blood and tissues resulting from abnormal loss of carbon dioxide due to hyperventilation).