If your symptoms worsen or don’t improve after 3 days of taking amoxicillin, seek medical advice immediately. This includes a high fever (above 101°F or 38.3°C), severe abdominal pain, or difficulty breathing.
Don’t delay seeking help if you experience a severe allergic reaction. This can manifest as hives, swelling of your face or throat (angioedema), difficulty breathing, or a rapid heartbeat. Call emergency services immediately.
Signs Requiring Immediate Medical Attention
Certain symptoms necessitate immediate medical attention and override any consideration of self-treating with amoxicillin. These include:
| Severe allergic reaction (hives, swelling, breathing difficulties) | Call emergency services (999 in the UK) |
| High fever (above 101°F/38.3°C) persisting despite amoxicillin | Contact your doctor or NHS 111 |
| Intense abdominal pain | Seek immediate medical attention |
| Bloody diarrhea | Contact your doctor immediately |
| Signs of dehydration (excessive thirst, dry mouth, dizziness) | Contact your doctor or NHS 111 |
When to Consult Your Doctor
Even if your symptoms are mild, contact your doctor if you notice any unusual changes, such as persistent vomiting, severe headaches, or yellowing of the skin or eyes (jaundice). These could indicate more serious underlying issues requiring specific treatment.
