These include a headache, dizziness, feeling sick, muscle pain, and feeling unusually tired or physically weak.
Others also report digestive system problems. This can include constipation, diarrhoea, indigestion or farting.
Rare side effects include loss of sensation or tingling in the nerve endings of the hands and feet, and tendon problems.
It suggests: “Speak to your doctor if you have muscle pain, tenderness or weakness that cannot be explained – for example, pain that is not caused by physical work.”