| banned stimulant | 3.42 | She tested positive for the banned stimulant ephedrine. | ||
| mild stimulant | 1.12 | Caffeine is considered a mild stimulant. | ||
| powerful stimulant | 0.79 | Nicotine is a powerful stimulant. | ||
| illegal stimulant | 0.72 | Italian investigators maintain the drugs contained illegal stimulants. | ||
| herbal stimulant | 0.59 | Ephedra is an herbal stimulant that acts like an amphetamine. | ||
| performance-enhancing stimulant | 0.53 | The IOC medical commission said bromantan was a performance-enhancing stimulant similar to amphetamines. | ||
| sexual stimulant | 0.33 | Such products are believed to cure bone ailments or act as sexual stimulants. | ||
| amphetamine-like stimulant | 0.26 | Ma huang naturally contains an amphetamine-like stimulant called ephedrine. | ||
| popular stimulant | 0.26 | Red wine mixed with strychnine was a popular stimulant at the turn of the century. | ||
| similar stimulant | 0.26 | The plant contains a deadly heart stimulant similar to the drug digitalis. |