test/letro

I'm currently taking Letro to get rid of some Gyno I've got going on, can I keep taking Test Eth. and Katanadrol while taking the Letro? or will it cancel out the Test? Im 5'6 178, 46 years old, taking .75 test on Mon and Thur and 5 tablets Katanadrol a day, 7 days a week.