Herbal antibiotics and other medications used for weight loss are mainly prescribed by doctors. They are not available over the counter. Herbal medicines that help people lose weight include fenugreek seeds, green leafy vegetables, and seeds of various fruits like almonds, peaches, watermelon, mangoes etc. Fruits and vegetables can be used for detoxification purposes. Fruits like guava, banana, pineapple and papaya are used for improving the metabolism.In addition, these medicinal seeds can be used to improve the digestion of food. They are very useful to people who cannot tolerate the taste of refined and processed food. The seeds of tomatoes contain alkaloids. These alkaloids are used for improving the metabolic rate of a person. Thus the use of these seeds can help people to lose weight effectively.