I am 29 years old height 5' my weight is 65.5kg i need to loose how much weight?what medicine can i take to reduce my weight?

Don't mess with meds: You would only need to lose about 7.5kg to get down to into the normal bmi range. To do this best, you need to find a way of eating and exercising that you can live with for the long-term. A great way to eat is to avoid simple, white carbs, including white rice and pasta, as well as white bread. Eat meats and fats, veggies and fruits. Exercise regularly and you'll see weight coming off!