Injecting amphetamine is especially dangerous like a large dose might be taken in a single go. The drug is usually very impure and may be filtered prior to injecting. If injecting devices is shared there is a hazard of an infection this sort of HIV or hepatitis. 長期的（習慣的）服用、または過量による効果として振戦、不穏状態、睡眠の時間帯の変動、肌荒れ、反射亢進、過呼吸、消化器系の狭小... https://felixqwutt.suomiblog.com/not-known-factual-statements-about-what-is-the-drug-amphetamine-51157974