Regenon (Diethylpropion) is the most commonly prescribed appetite suppressant. The active ingredient of Regenon as well as of Tenuate is Diethylpropion. It is used in the short-term treatment of obesity. Regenon should be used in conjunction with an overall diet plan to reduce weight. The most popular diet pills are appetite suppressants because they are very effective, have the least annoying side effects, and generally are safer than most other types. Manufacture: TEMMLER PHARMA & Co. KG Regenon is an appetite suppressant, which is used in the short-term treatment of obesity with physically workouts and well balanced diet. It is useful only during the first few weeks of a weight-loss program, because its appetite-reducing effect tends to decrease after a few weeks. Regenon can help you to lose weight while you are learning new ways to eat and to exercise. Brand Name: Regenon. Generic Name: Diethylpropion. This medication description is not meant for treatment prescription without the intervention of a specialist Common Uses Regenon is an appetite suppressant, which is used in the short-term treatment of obesity with physically workouts and well balanced diet. It is useful only during the first few weeks of a weight-loss program, because its appetite-reducing effect tends to decrease after a few weeks. Regenon can help you to lose weight while you are learning new ways to eat and to exercise.