Don't take diet pills, don't drink tea, I have eaten brands, some have vomiting and diarrhea, some have dizziness and brain swelling, and some have palpitations and weakness ~ which is very harmful to the body!
Exercise is the only healthy and lasting way to lose weight. You don't get much chance to exercise, do you? Just stick to climbing stairs or walking, or skipping rope or something ~ go climbing on weekends ~ or try to find a nearby gym.