The test aromatizes into estrogen which will cause the side effect of water retention. Water retention will cause blood pressure to rise. This is why you want to run an AI from day 1 of your cycle. Arimidex will work but I prefer Aromasin. It is a suicide AI so there is no risk of estrogen rebound. ag-guys and sarms1.com have liquid Aromasin or arimidex that you can legally purchase.