Common side effects (occurs in less than 1 in 10 people but more than 1 in 100 people who use the medicine) • Sensation of spinning (vertigo) • Your body does not make enough thyroxine, a body chemical called a hormone (hypothyroidism) • Decrease in the number of red blood cells (anaemia) • Dehydration • Depression • Tingling, prickling or numbness of the skin (paraesthesis) • Hot flushes • Wheezing • Constipation, swollen stomach, inflamed mouth • Pain and formation of extra tissue in the skin around the injection site