Anytime you consume fewer calories than you expend, you will experience weight loss. Diet pills are used as a help to behavior modification and dietary instruction to help increase the number of pounds lost. It is advisable to use diet pills under the supervision of a physician. When using diet medication, monitoring is very important. Before beginning a program using diet pills, the person should have a physical examination to ensure there are no medical problems such as heart disease, high blood pressure or other diseases discouraging the use of diet medication. Once the patient is on a program of a nutritionally balanced, low calorie diet supplemented by the medication, there should be monitoring to insure that no significant problems arise. The persons on weight control programs should also take vitamins to supplement the low calorie diet. The combination of diet medication, behavior modification, dietary instruction, exercise, and medical monitoring will help with weight loss.