Medicines that normally reach your bloodstream in very small to moderate amounts are more likely to have significant interactions with grapefruit. This is because the effect of grapefruit can cause much larger amounts of the medicine to get into your bloodstream and cause side effects.
Safety of weight-loss drugs. Drugs for short-term use. Diethylpropion (Tenuate), phentermine (Adipex-P), benzphetamine (Didrex) and phendimetrazine are approved for only short-term use â generally less than 12 weeks. These drugs are classified as controlled substances because they have the potential to be abused.
A: Phentermine (Adipex-P) is a stimulant used for weight loss. Phentermine is approved for use in patients with a body mass index BMI of greater than 30 kg/m2 or greater than 27 kg/m2 in patients with other risk factors such as diabetes, high cholesterol and high blood pressure.hentermine is the generic form of the brand-name drugs Adipex-P, Suprenza, and Ionamin, which are used for weight loss. Phentermine decreases appetite and stimulates the body to burn calories more quickly.