A smoker becomes short-winded and has reduced work capacity, especially right after smoking, because of the decrea ed oxygen carrying capacity. Any amount of alcohol in the blood affects human coordination and reflexes. As the amount of alcohol in the blood goes up, performance goes down. High alcohol levels affect judgment. Alcohol is a contributing cause in thousands of fatal accidents each year.
Drugs range from aspirin to heroin.
They all alter the body and mind. Hallucinatory drugs have direct and devastating effects on the person using them. There is also a secondary danger. A person using drugs may not recognize a dangerous situation. These have warnings included on the packaging.