Consuming **drugs** before driving significantly increases the **probability of having an accident**. This is because drugs negatively affect the abilities necessary to drive safely.

- **Cannabis**: It can alter environmental perception, make distance calculation difficult, reduce concentration, and increase reaction time. It can also cause drowsiness at the wheel.

- **Cocaine**: Increases impulsivity and aggressiveness, decreases danger perception, and can lead to more reckless driving.

- **Ecstasy**: Can cause hallucinations, light sensitivity, blurred vision, loss of concentration, and fatigue after its effects wear off.

- **LSD**: Causes hallucinations, aggressive reactions, and anxiety, which can be very dangerous when driving.

- **Amphetamines**: Increase impulsivity and violence, reduce the sense of danger, and can cause sudden fatigue when their effects wear off.

Since all these substances significantly alter driving skills, it is evident that the risk of accidents is **higher** when driving under their influence.