Diethylpropion is a stimulant used for weight loss. It is available in both immediate and controlled-release pills. Tenuate is a 25 mg pill which is generally taken before each meal. Tenuate dospan is a 75 mg controlled-release tablet which is taken once a day, usually in the morning. Phendimetrazine is another stimulant prescribed for weight loss.
Some physicians prescribe it in combination with phentermine to reduce drug tolerance.
Phendimetrazine comes in a 35 mg tablet taken before meals. Like diethylpropion, phendimetrazine is no longer under patent, and is now manufactured by several companies. It is a schedule 3 medication. Phentermine is the most commonly prescribed of the stimulant anorexiant medications. Phentermine hydrochloride has been available in the United States since the early 1970s and phentermine resin since 1959.