It is unwise to advise you to take medication for losing weight and shaping up. The best, tried and tested approach is
(1) High fibre diet like oats, wheat bread, fresh fruits and vegetables. Avoid colas, fried stuff, cheese, butter, jams, chips.
(2) Higher protein, low carb diet like cereal, pulses, lean mean, eggs.
(3) Brisk exercise for 40 minutes a day like brisk walking or jogging.
(4) Adequate stress
relief like meditation
(5) Sleep for atleast 6-8 hours a day.
(6) Hydrate well with atleast 1-1.5L per day.
It will take you around 2-3 months and you should be fit and in good shape by then.