Is Lupride Depot 3.75mg Injections Safe For Ovarian Cysts?

Hi I am 36yrs old and have history of ovarian cyst and fybroids. About 8 yrs. ago I had removed uterine fybroids and had a cyst burst. Now from last few months I am having terrible pain during menses. Even after the bleeding stops the pain doesn't for almost 12-15 days. The ultrasound shows 3 cysts not so big. My gynac kept me on 15 days course of cylreg harmone tablets but didn't help. Now he suggested three 'Lupride Depot 3.75 mg' injections a month apart. I want to know the side effects and whether it is the best option for me? Please help.