The hormonal agents generally cause side-effects that are similar to menopausal symptoms. The treatment is generally well-tolerated, but some patients (some 10% or less) do report the ff: hot flashes, joint pain/stiffness, vaginal dryness. Rarer events (meaning about 1% of the time) poor appetite, vaginal bleed, and somnolence (increased sleeping time or more frequent drowsiness).
The effect of bone is also a concern due to fracture risk. Medications for osteoporosis are recommended (its good you are taking them already), as well as calcium and Vit D supplements.