Alcohol is not the only drug that can impair your ability to drive. Almost any drug can have a harmful effect on your driving skill. There are many different kinds of drugs. some can be bought only by prescription. Others can be bought over the counter without a prescription. Some drugs are against the law but can be bought illegally. It depends on the drug itself to determine how much it can affect you. Some drugs can decrease your ability to make sound decisions and respond well to situations. Other drugs can change the way you think. It is important that you know about these drugs and their effects on driving. Once you understand the danger of combining drugs and driving, you can take steps to avoid putting yourself and others at risk.

Synergism is the interaction of one drug with another to enhance the effect of one...