41 • symptoms of low blood calcium levels including muscle cramps or spasms and/ or tingling sensation in the fingers or around the mouth, • stomach or peptic ulcers (sometimes severe or with bleeding), • narrowing of the gullet (oesophagus – the tube that connects your mouth with your stomach), • blurred vision, pain or redness in the eye, • rash made worse by sunlight, • severe bone, muscle and/ or joint pain, • mouth ulcers when the tablets have been chewed or sucked, • transient flu-like symptoms, such as aching muscles, generally feeling unwell and sometimes with fever usually at the start of treatment.