"it does as it should: it prevents pregnancy.  other than that i&#039;ve gained weight and struggled to lose (still haven&#039;t and still struggling). my mood swings are awful. i bleed for up to two weeks at a time, although no cramps. my sleep pattern is erratic and i wake for two hours nightly and almost always lethargic and no energy or motivation. my appetite is ferocious. i also lost my sex drive which negated its purpose. i&#039;ve since had the coil put in and awaiting to see if things will improve."