Adipex (phentermine) can be used by patients diagnosed with severe obesity that are unable to control their food intake and can't lose weight consistently. Adipex can be taken for several months and you will need to follow all the recommendations of your health care provider to make sure the treatment is efficient for you and you are not using too much of this drug. Do not take Adipex for longer than recommended as an addiction may form, and you will later have trouble stopping the treatment, as withdrawal symptoms will occur. To avoid unpleasant health effects you will need to take Adipex once a day with a full glass of water and avoid combining this drug with guanadrel, antidepressants, high blood pressure meds, oral insulin or diabetes medications, or guanethidine. Some of the drugs mentioned can interact with Adipex creating danger to your health and ever life, so you need to discuss any of them with your doctor in case of taking them. Also make sure your doctor knows about all the medical conditions you have or used to have, such as glaucoma, problems with your thyroid, a history of drug or alcohol abuse, seizure disorder, high blood pressure, anxiety disorder, arteriosclerosis, diabetes, and heart disease.