Seek urgent care for any skin rash, especially with fever, blistering or mouth sores. Rare but serious skin reactions can occur (people of some Asian ancestry may be advised a blood test first). Tell your doctor promptly about sore throat, fever, bruising, yellowing of the skin or unusual tiredness. May cause drowsiness, dizziness or double vision, especially at first. Avoid driving until stable, and avoid alcohol. It interacts with many medicines, including hormonal contraceptives (which may become less effective). Use in pregnancy or breastfeeding only on specialist advice. Store below 30°C, protected from moisture. This product information is for general guidance only and does not replace professional medical advice. Always consult a qualified healthcare provider before starting any new medication or supplement. Keep all medicines out of reach of children.