Driving on medication: what every fleet manager should know
When we think of driving risks, we tend to focus on distractions, fatigue or alcohol. But even a seemingly harmless antihistamine or everyday painkiller can be just as dangerous behind the wheel.
Many common medications can seriously affect a driver’s ability to concentrate, react quickly or stay alert. And while the effects might not be well-known, the consequences can be serious – for drivers, other road users and the businesses responsible for their vehicles.
For fleet managers, this raises a tricky question: how do you keep your drivers safe when you might not even know what they’re taking?
Here we explore how medications can impact driving, what your responsibilities are and how to manage the risks without crossing personal boundaries.
Common medications that can impact driving
Some over-the-counter and prescription drugs can cause side-effects that make it unsafe to drive, including:
- Drowsiness
- Dizziness
- Slower reaction times/movements
- Blurred vision
- Nausea
- Difficulty focusing
These effects don’t always occur immediately. Some medications are slow-releasing, with symptoms that can last for hours — or even into the next day.
If a driver is taking medication, they should check the instruction leaflet for guidance or consult their GP or pharmacist before getting behind the wheel.
In some countries, certain medications are classified as controlled substances, making it illegal to drive while using them. Blood level thresholds and penalties vary by location, so it’s vital for fleet operators to stay informed about local regulations.
So which medications are most likely to impair driving?
- Some antidepressants
- Anti-anxiety medication
- Sleep aids or sedatives
- Anti-seizure medicine
- Opioids
- Cold and flu remedies or allergy medications that contain antihistamines or sedatives
- Muscle relaxants
- Amphetamine
- Antipsychotic medication
Understanding your legal and ethical responsibilities
If an impaired driver is involved in a collision and no checks or policies were in place, the consequences can be severe. Fleet operators could face anything from insurance complications and legal action to prolonged vehicle downtime and reputational harm.
Employers have a duty of care to ensure their employees are safe while working – and that includes time spent on the road.
That’s why clear, comprehensive policies are essential – not just for alcohol and illegal drugs, but for everyday medications too.
By including medication guidance in your driver policy, you not only meet health and safety obligations, but also help prevent incidents, reassure drivers that their wellbeing is a priority and demonstrate that support is available.
Balancing safety with responsibility
Fleet managers must address driver health carefully, but knowing how to approach sensitive topics isn’t always easy.
Some employees may take medication for health conditions they’d prefer to keep private. They may worry that disclosure could affect how they’re treated, jeopardise their role or lead to uncomfortable scrutiny.
It’s a delicate balance that requires empathy, good communication and thoughtful policies. Creating a culture that supports openness, without pressure, can make a big difference.
Practical steps include confidential self-assessment forms, regular fitness-to-drive checks and clearly written driver health policies that outline what support is available.
Driver training is also crucial. Including content on how medications – even over-the-counter ones – can affect driving helps raise awareness and encourages honest conversations.
Training for managers is equally important. It gives them the confidence to handle these discussions in a non-intrusive, supportive way. When combined with access to occupational health professionals, this creates a safer, more transparent environment where drivers feel comfortable seeking help.
In some cases, telematics data can offer further insight, flagging changes in driving behaviour that may indicate a problem. If an issue is highlighted, flexible work adjustments can be offered to those needing temporary time off the road.
A supportive culture
Medication isn’t usually the first thing that comes to mind when thinking about road risk – but it’s a hidden hazard that fleets can ill afford to ignore.
By staying ahead with clear policies, practical tools and sensitive management, fleet operators can reduce the risk of incidents and the costly consequences that come with them.
Just as importantly, they can build a culture where drivers feel supported, informed and empowered to speak up. When it comes to road safety, every conversation counts.