It works by reducing the build up of dependence by the body to Phentermine, thereby increasing its effectivity over longer periods of time, and also seems to inhibit appetite more strongly. This combination can be prescribed by doctors legally in America, although approval by the FDA has not yet been given to the mixture. If you decide to use Phentermine, you should be aware that although this is considered one of the safest weight loss medications, it does have side-effects,most of which are minor.One of the most common complaints of people taking it is that it prevents them falling asleep,or causes restless sleep, and for this reason it is usually advised to take the daily dose in the morning. On the other hand, it can sometimes cause drowsiness,and you should not drive until you know if it affects you in this way. Other side-effects often reported are mood changes, most of which are transient and disappear after a few days. You should also be aware that Phentermine interacts with many prescription drugs, and it is important to inform your doctor about any medication you are taking or intend to take. Adipex-P ® Anoxine-AM ® Duromine ® Fastin ® Ionamin ® Obephen ® Obermine ® Obestin-30 ® Phentrol ® Mirapront ® Obenix ® Oby-Trim ® Panshape-M ® Phentamine ® Phentercot ® Phentride ® Pro-Fast HS ® Pro-Fast SA ® Pro-Fast SR ® Teramine ® Zantryl ® - brand named phentermine comes in tablet and extended-release capsule contained same active ingredient : Phentermine Hydrochloride. order Phentermine online - no prescription needed