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Common Types of Drugs Involved in DUID Charges

When involved in a drug DUI, it is important to contact a Michigan DUI drug lawyer, who can use their experience and knowledge to build a strong defense regardless of the type of drug involved.

In Michigan, Drug Recognition Experts (DREs) are often called to assist in impaired driving investigations in which the driver appears to be under the influence of a substance other than alcohol. DREs are law enforcement officers who are specially trained to recognize the signs and symptoms of drug use.

As part of their training, DREs receive instruction in the following seven categories of drugs:
  • Central Nervous System Stimulants
  • Central Nervous System Depressants
  • Cannabis
  • Narcotic Analgesics
  • Hallucinogens
  • Inhalants
  • Dissociative Anesthetics (PCP)

Drugs are placed into one of these categories based on the effects they have on the user.


The DRE training program teaches officers to recognize which category of drugs a suspect may have ingested based on the symptoms he or she displays.

  • Central Nervous System (CNS) Stimulants elevate the user's heart rate and blood pressure and cause over-stimulation. Examples of stimulants include cocaine, crack, any form of speed, amphetamines, and methamphetamine.
  • CNS Depressants essentially have the opposite effect of stimulants. These drugs can significantly reduce reaction times by slowing down the brain. Examples include alcohol, certain anti-depressants, anti-anxiety medication such as Xanax and Valium, and barbiturates.
  • Cannabis is the scientific name for the plant that produces marijuana. In Michigan, you may be charged with operating while intoxicated (OWI) Marijuana, operating while visibly impaired (OWVI) Marijuana, or operating with a presence of drugs (OWPD) Marijuana .
  • Narcotic Analgesics are drugs that are designed to relieve pain but have a high rate of abuse due to their euphoric side effects. Morphine, Methadone, OxyContin, Codeine and heroin are included in this category.
  • Hallucinogens, as the name implies, are drugs that cause the user to experience hallucinations. Drugs like LSD (acid), psilocybin (mushrooms), peyote, and MDMA (Ecstasy) can cause hallucinations.
  • Inhalants include a variety of substances that users may breathe in order to achieve mind-altering effects. Gasoline, paint thinner, plastic cement, and hair spray have been used as inhalants.
  • Dissociative Anesthetics, or PCP, distort and inhibit the brain's perception of pain.
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