Zoladex (GNRH agonist) is great, comes in the form of a small implant that goes in your abdomen , it lasts 3 months each time which is great, they also make once a month implants. IT has no side effects and brings T to castrate levels. I can't fault it it's great albeit on the expensive side, I'm on my last implant as my surgery is coming in a week and a half.
Also everything Kay says will help you, she's a little on the stubborn, sassy side but she knows her stuff. Lol