What is overdose for a drug?

An overdose for a drug is when you take too much of the drug and your body can't handle it. Your body starts to react and counter the drug but often fails and then your body starts malfunctioning. The severity of the overdose varies from one drug to another. Drugs such as cocaine, methamphetamine, and even alcohol can lead to death if overdosed. Drugs such as marijuana, if overdosed lead to sleeping.