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What happens to a driver’s abilities after taking edibles?

The use of cannabis-infused edibles has become more common in recent years. These products can be used to facilitate a number of aims, from pain relief to relaxation. Yet, while they are generally “safe” to take in the privacy of one’s home, they pose certain risks if those who take them are too quick to get behind the wheel, operate heavy machinery, etc. after ingesting them. 

For example, many people are unaware of the significant impact that edibles can have on a motorist’s ability to drive safely. Cannabis edibles affect cognitive functions critical for safe driving. THC, the active ingredient in cannabis, impairs motor coordination, reaction time and judgment. These impairments can result in delayed responses to traffic signals, difficulty maintaining lane position and poor decision-making in emergency situations. The mental fog and altered perception caused by THC can make it challenging for drivers to process information quickly and accurately, elevating a motorist’s risk of causing – or otherwise being involved in – an accident. 

Key considerations

Edibles are consumed orally, and it takes longer to feel their effects than it does to feel the effects of smoking or vaping cannabis. It can take anywhere from 30 minutes to two hours for the psychoactive effects of edibles to kick in. This delayed onset often leads individuals to underestimate the potency of the edibles they’ve ingested, potentially resulting in overconsumption. Once the effects do begin, they can last for a long time—anywhere from four to twelve hours—creating a prolonged period of impairment.

Ultimately, edibles can significantly alter a driver’s perception of time and space. This can lead to them misjudging distances and speeds, which is particularly dangerous when navigating intersections, merging lanes or reacting to sudden changes in traffic conditions. Additionally, cannabis can affect concentration, making it difficult for drivers to focus on the road and their surroundings. This lack of focus can increase the likelihood of accidents, especially in complex driving environments.

Studies have shown a clear link between cannabis use and an increased risk of traffic accidents. Drivers under the influence of cannabis are more likely to be involved in collisions due to the aforementioned impairments. The risk is compounded when edibles are consumed in combination with alcohol or other substances, further diminishing a driver’s ability to operate a vehicle safely.