Hold the press????? I just got the results of a blood test confirming hypercalcemia and high levels of parathyroid hormone. These results may or may not be related to Breast Ca. Further investigation needed I guess. However the point in posting this is to note that hypercalcemia symptoms can include fatigue, insomnia/interrupted sleep, bone pain ( I think?) brain fog, depression etc etc ( among others). So at the moment I cannot tell how many of the symptoms I just listed can be attributed solely to letrazole....More to come I expect.