Although obesity is the problem that has assumed a dangerous proportion at present, diet pills plays an important role in counteracting weight gain. As obesity is the main cause of many life threatening diseases, it can not be ignored. Not only the adults, but also the children and adolescents are suffering from obesity. Obesity will not only affect the body but also the mind. It will lower your self confidence. It will lower your work output. Hence the problem obesity must be tackled at any cost. The best way to lose weight is by good diet plan, and perfect exercise program. Besides these we can use diet pills that are tested and proved safe by the medical experts. There are several diet pills available in the market. These pills if consumed as per the advice of the doctor reduce your weight and make you slim and healthy. Phentermine hydrochloride is a diet pill that is very commonly used by many people. This diet pill reduces or suppresses the appetite there by reducing the intake of food. This medicine is very safe to consume and tested scientifically for its effectiveness and safety. The best results are obtained when this diet pill is taken along with perfect diet plan and exercise. Phentermine is known to stimulate the region hypothalamus and disturbs the function of few neurotransmitters. Hypothalamous is a part of a brain that controls appetite, body temperature and autonomic nervous system. Phentermine diet pill must be consumed as a whole on an empty stomach preferably before breakfast. It is better to avoid phentermine in the latter part of the day as it will disturb your sleep. Benzphtamine - this is another popular diet pill that is widely used by obese people to reduce their weight. This is again an appetite suppressant. This is an important diet pill that is used for short time management of obesity. This diet pill must be consumed once daily. We should not increase the dose and must stick to the dose prescribed by the doctor otherwise we will get addicted to this medicine. If over dose of benzphtamine is suspected we must consult the near by poison control room at once with the dose of medicine consumed. Tremor, fast breathing, restlessness, vomition, and diarrhea are some of the symptoms of over dose. This diet pill must be stored at room temperature and away from light, because moisture and heat will spoil the medicine and make it not suitable for consumption. Stomach upsets; constipation, sleeplessness, irritability and dry mouth are some of the possible side effects of diet pill, benzphtamine. Phendimetrazine-this is a yet another popular diet pill used for the management of obesity. This diet pill is consumed orally. It reduces the appetite thus helping to lose weight. This diet pill increases the rate of heart beat and blood pressure. These changes will make the person less inclined for food. Phendimetrazine in combination with good diet plan and exercise program will produce quick results. One disadvantage of this diet pill is that the people develop drug resistance faster; hence this diet pill can be used for a very short period of time. The long acting phendimetrazine must be consumed as a whole. If broken down by chewing the action of the drug will not be satisfactory and the side effects will also be more. Central nervous system disturbances, blurred vision, GI tract disturbances are some of the possible side effects of this diet pill [phendimetrazine].