It is most often seen in the form of white pressed tablets, red or white capsules, or a white crystalline powder. It is usually taken orally in a single dose of 80 to 160 milligrams. It begins to work about an hour after ingestion, reaching a peak in the second hour, with the effects lasting for a total of four to six hours.
常見的包括白色藥片、紅色（白色）膠囊或粉末形式，服用後約一個小時到一個半小時開始作用，第二個小時達到高潮，可持續四到六個小時。