Phentermine is a drug that appeared as a result of scientific studies and has been designed for the needs of people diagnosed with obesity and trying to lose weight. Make sure you inform your health care provider of any medical conditions you have that may potentially prevent you from safely taking this drug. The following ones are known to do that: seizure disorder, arteriosclerosis, diabetes, high blood pressure, problems with your thyroid, a history of drug or alcohol abuse, glaucoma, anxiety disorder, and heart disease. You will also need to follow the dietary recommendations of your doctor, as well as exercise regularly. Taking phentermine regularly is not going to give you the result desired –you will also need to apply some effort to lose weight and maintain the progress achieved. It is not known for sure whether phentermine is going to harm an unborn baby, so it's best if you first talk to your health care provider in case of a pregnancy. If you get pregnant while using this medicine – contact the doctor that prescribed this drug or some other health care professional to learn about the options you have. Never share your dose of phentermine with other people to whom it was not prescribed.