Very rare side effects (reported by less than 1 in a 10,000 people) include: fatigue/ feeling tired, shivering, severe diarrhoea, joint pain, sore throat, reduced sense of taste, sweating, being unable to sleep, general pain, hives or nettle rash, other types of rashes, flu-like symptoms, weakness, feeling cold, breathlessness, pins and needles, dehydration (loss of water from the body), swelling of face, high blood pressure, chestiness, itching, and swelling of the lymph glands.