I am 43 years old female. conducted high resolution sonography of breast. Findings were right breast shows a well defined anechoic cystic lesion measuring 1.8 x 1.3 cm in the lower quadrant at 6 o clock position at 3 cm from the nipple. After selecting a suitable site in supine position,US guided aspiration the right breast cystic lesion was done and about 2ml of straw coloured fluid aspirated. After this procedure doctor advised me to take sevista 60 mg tablet for 6 weeks.(1 tablet per week) 1/2 a tablet each on satuday and wednesday. My periods are regular. Please suggest whether I should take this tablet or not.