Adipex (phentermine) is a prescription medication used to aid in weight loss by suppressing appetite. It is typically prescribed as part of a short-term weight management plan for individuals with obesity or weight-related health issues. Adipex stimulates the central nervous system, increasing heart rate and blood pressure while decreasing appetite. It is most effective when combined with a proper diet and exercise regimen. Common side effects include dry mouth, insomnia, and increased heart rate. Because it is a stimulant, Adipex can be habit-forming, so medical supervision is necessary.