As a result, a marijuana smoker's biggest driving problems occur when faced with unexpected events, such as a car approaching from a side street or a child running into the street from between parked cars. These problems get more severe after dark because marijuana also causes a severe loss of night vision. Other Drugs Remember, you can still be considered OUI with prescription drugs. It is illegal to operate a motor vehicle while impaired by ANY substance. Prescription sedatives and tranquilizers make you drowsy and therefore dangerous as a driver.
Most medicines taken for colds, hay fever, or headaches can cause drowsiness.
Pain killers and medicines containing codeine can be especially dangerous. Stimulants such as pep pills, speed, cocaine, and diet pills may make you awake and more aware for a short period of time, but this is inevitably followed by fatigue, nervousness, dizziness, and a lack of concentration. These substances can also affect your vision. Inhaling controlled substances such as solvents or glue vapors is not only a serious health hazard but can make you unable to operate a motor vehicle properly. Ask your doctor or pharmacist if you're not sure.