Whatever happens, never take an overdose of this medicine.

这种药千万不能服过量。

《新英汉大辞典》

An overdose of sun, sea, sand and chlorine can give lighter hair a green tinge.

过多的阳光、海水、沙和氯会给更浅色的头发带来点绿色。

《柯林斯英汉双解大词典》

Fish can be euthanized by an overdose of tricaine methanesulfonate.

过量服用三卡因甲磺酸盐可以使鱼安乐死。

youdao

But these may not develop for two or three days after an overdose too late to prevent damage.

VOA: special.2009.07.08

Symptoms of an overdose include rapid heartbeat, heart failure, shortness of breath, unconsciousness and coma.

BBC: Factfile on drugs

She also took an overdose of medication last week for which she needed hospital treatment.

BBC: Anger at ex-royal aide's escape

An overdose may produce slow and shallow breathing, clammy skin, convulsions, coma and death.

CNN: Heroin use on the rise