Consume less calories than you use. That's the only true rule of cutting. Do you know your maintnance calories level? You need to keep protein intake high to ward off excessive muscle catabolism, but other than that it's a free-for-all when it comes to opinions on dieting. The one constant is:
More calories burned than consumed daily= weight loss
The drugs are there to preeserve lean body mass so that the weight lost is predominantly adipose tissue. Eat frequent meals (6-10 a day) to keep your metabolism stoked and to keep a constant supply of nutrients to you muscles. As far as low carb, no carb, zone, or whatever other "brand" of diet, it's up to you to ficure out what works best for you.