Almost any drug can affect a person's driving skill. This is true of prescription drugs, drugs you can buy over the counter, or illegal drugs. Taking any drug can affect safe driving. Medicines taken together, or used with alcohol can be dangerous. Drivers should ask their physician or pharmacist about how any medicine may affect their driving.
Many drugs have unexpected effects when they are taken with alcohol.
Drugs and alcohol should never be used at the same time. Later, however, they can cause a person to be nervous, dizzy, and not able to concentrate. They can also affect vision. Make sure you read the label and know the effects of any drug you use. If it is a common drug, read the label.