I have lost heaps of weight without cardio, i just do weights and cut out bread, anything with flour and fizzy drinks, i use to eat sushi, but cut that out. I drink cinnamon tea in the morning, afternoon at night, great for supressing the appetite and can still sleep well, no drugs needed.
I used to run on the treadmill daily, i did lose weight doing that, but realised if i just managed my calories i could save the cardio and think smart. Running for a hour will burn off one mars bar, just dont eat the mars bar.