Phentermine can range from Adipex-P, Lomaira, to many more and all of these require you to have a prescription from a recognized doctor as they contain various risks in regards to side-effects. The cannon objective of these appetite suppressant drugs is to decrease your appetite and give you a continuous feeling of being full. Phentermine has also been seen to be widely available in the market in a combination with Topiramate for weight loss and fitness, such as in Qsymia.