I am 22 f dental student &my bmi is around 37 & i guess its the high time to loose weight as i got callus and i guess i got acanthosis nigrica too n so how should i start doing inspite of being busy and should i go for metabolism increasing tablets?

Weight loss.: If you plan to use a pharmacologic approach to weight loss - Orlistat often does not require a prescription. However, a lot of what you might buy over the counter is likely to be ineffective. Would look into prescription medications with a medical provider if you have not been able to lose and sustain weight loss through other methods.

Weight loss: First step should be to see your GP for a complete Physical to rule out a metabolic cause for your high BMI. If there are no physiologic causes, it then becomes a matter of calories in-calories out. A nutritionist's help can be invaluable.