As my platelet count climbed over and up from 700 I got my diagnosis of ET. Went to Standford for bone marrow test and found Jak2 positive. I'm 70 and also have other health issues. My question is: Has anyone had Hydrea reduce platelet count, as I have (338), and then stopped taking it? I wondering if, and how long it would take, the count to climb back over 750?