Depo-provera birth control, what are the side effects?

See below. The most common side effects are irregular menstrual bleeding (or no bleeding at all) and weight gain. At one year, around 45% of women have no periods. After another year up to 75% of women have no periods. (Is that a side effect or a benefit?) Less common side effects are headaches mood changes, dizziness and decreased sex drive. Its very effective contraception! Best wishes!