I have been on lexapro for 21day now and it seems to have worked with anxiety however my tiredness has increased 10fold I can sleep all day and that has increased not decreased will this continue of slow down. I am taking also valiun10ml. I tamazapam and 1/2a serapax tablet a day. I have metastatic bone cancer from lung cancer. I am Using a 100ml patch of dorogesic for pain but since starting these lexapro the tiredness has gotten worse. Do I tsty on them or is it somthing else that could be causing it?