**Amphetamines** are drugs that negatively affect driving. One of their main effects is the **delay of fatigue and sleep**. This means that, when consuming amphetamines, a person may not feel tired for a while, which can lead to a false sense of being alert and in control. However, when the effect of the drug wears off, the driver may suddenly feel very tired and, in the worst case, fall asleep at the wheel unintentionally.

Therefore, driving under the influence of amphetamines is dangerous because it **reduces the sensation of fatigue**, which can lead to risky situations when the effect wears off and tiredness suddenly manifests.