- A possible infection (including signs such a fever and rashes)
- Chest pain or shortness of breath
- Possible broken bones, neck or head injuries
- Sudden loss of sight or eye pain
- New headaches, loss of consciousness, fits/seizures or slurred speech
- Loss of power to any of your muscles, facial droop, or loss of sensation
- Sudden or heavy bleeding
- Severe mental health problems such as psychosis or suicidal thoughts