For example, during the withdrawal period from ethyl alcohol or sleeping medication, some patients may suffer cramps. Those on amphetamines may have hallucinations or other psychological symptoms.
像酒精、安眠藥戒斷時，少部分的人會有抽筋現象；「安非他命」中毒時，會產生幻聽、幻覺等精神症狀。