According to Dr. Nora Volkow who is the director of the National Institute on drug abuse, the most harmful drugs are nicotine and alcohol.
Alcohol is considered to be a depressive, which means that it tends to slow down both physical and mental processes. Alcohol has a number of negative side effects, including giddiness, drowsiness, and dizziness. However, alcohol and nicotine are not toxic drugs, but they are the most dangerous.
So, according to Dr. Nora Volkow who is the director of the National Institute on drug abuse, the most harmful drugs are nicotine and alcohol. However, nicotine is said to be the chemical which is found in cigarettes and derived from plants, is present in tobacco.
Hence, Nora D. Volkow is known as the Director of the National Institute on drug abuse.
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