This could be a sign of a kidney problem (interstitial nephritis) • More sugar than usual in your water (urine) • An increased number of certain white blood cells (eosinophilia) found during a blood test • Blood tests showing too few blood cells in your blood (pancytopenia) • Blood tests showing a change in the amount of salts such as sodium, calcium, magnesium and chloride in your blood • Slowed or impaired reactions • Change in the way things smell • Difficulty breathing or worsening of asthma