Can driving a motor vehicle after taking substances which alter the central nervous system can have side effects which include impaired vision reaction time and vision?

Yes, driving a motor vehicle after taking substances that alter the central nervous system can significantly impair a person's abilities. Such substances can lead to side effects including reduced reaction time, impaired vision, and decreased overall cognitive function. These effects can greatly increase the risk of accidents and endanger both the driver and others on the road. It is crucial to avoid driving under the influence of any substances that could impair judgment or motor skills.