if you are having libido issues with dbol its more likely due to prolactin, though when using any aromatizing steroid you should be using aromasin (at the very least a low dose, to limit conversion- if you feel that you want more than is minimally required). Lowering estrogen conversion will help somewhat with prolactin (from estrogenic metabolites) though dbol itself (for various reasons, often becoming more apparent with age and usage of AAS) can upregulate PRLR and PRL release. In which case, pramipexole (researchstop or script) or cabergoline (cabaser from aurapharm) would be indicated (because in that scenario E suppression alone is not sufficient, even high level suppression with letrozole)