When should I call my doctor when using extended-release amoxicillin?

Call your doctor if you have any of the following:

• rash, hives, itching, or shortness of breath, which could be a sign of an allergic reaction to amoxicillin
• severe nausea or vomiting, although mild nausea with amoxicillin is normal
• severe stomach pains, diarrhea, or bloody stools, although mild diarrhea with amoxicillin is normal
• yellowing of your eyes or dark urine, which may indicate liver problems
• high fever, chills, or persistent sore throat, which could mean that amoxicillin may not be curing your infection