Stop taking the capsules and tell your doctor immediately… If you have an allergic reaction such as skin rash, swelling of the face, wheezing or difficulty breathing If you have heart problems such as pain in the chest If you have liver failure (symptoms may include nausea (feeling sick), diarrhoea, jaundice (your skin or the whites of your eyes look yellow) If you have blistering or peeling of the skin If you have severe stomach pain or any sign of bleeding in the stomach or intestines, such as passing black or bloodstained bowel movements, or vomiting blood