83 More common effects These could affect between 1 and 10 in every 100 people Blood pressure may be made higher or lower You may get back pain Ankles, legs and feet may swell (fluid retention) You may feel numb You may get stomach ache, indigestion, bloating and wind Tests may show abnormal kidney function You may feel agitated or find it hard to sleep There is a risk of anaemia You may get a sore throat or difficulty breathing Your skin may be itchy You may pass less urine than usual Dry socket (inflammation and pain after a tooth extraction). > If any of these affects you, talk to your doctor or nurse.