Drostanolone Propionate 100mg / ml 10 x 1ml Mastebolin is alpha pharmacys version of drostanolone commonly known as masteron. Mastebolin is a cutting drug that has anti estrogenic properties and when taken in high doses can increase lean muscle mass. Mastebolin is good to use on a course with high volumes of testosterone as this will reduce water retention and the risk if gyno. Common doses are 100mg-500mg per week, this drug would also work extremely well on a cutting cycle with trenbolone and test proprianate.