Published by Drug Driving Solicitors, specialist defence lawyers for drug driving charges across England and Wales Has your blood test result mentioned benzoylecgonine? If so, you are probably facing a drug-driving allegation and want to understand what the result means. Your body produces benzoylecgonine as it breaks down cocaine, and driving with too much of it in your blood is a criminal offence in England and Wales. That is the case even if you felt completely fine. This article explains what benzoylecgonine is, the legal limit, how the police test for it, the penalties you could face, and what you can do next. Benzoylecgonine (BZE) is the main metabolite of cocaine: the chemical your body produces as it breaks cocaine down. It does not have an intoxicating effect itself, yet finding it in your blood is strong evidence that cocaine has been used. The police test for BZE in drug-driving cases, as it is one of the substances most closely linked to cocaine. Your paperwork may refer to it either as BZE or as a cocaine metabolite. Because BZE is cleared from the body more slowly than cocaine, benzoylecgonine can be detected after cocaine's effects have worn off. You may feel completely sober and yet still have a measurable level. It remains for a period that depends on factors such as how much was taken, how often, and your individual metabolism. A reliable "safe" waiting time before driving is not something that exists. It is, if the level is above the legal limit. In England and Wales, driving or attempting to drive with a specified drug in your blood above its set limit is an offence under section 5A of the Road Traffic Act 1988. It came into force on 2 March 2015. Both the drugs covered and their limits are listed in The Drug Driving (Specified Limits) (England and Wales) Regulations 2014. A charge can arise from either a cocaine or a benzoylecgonine reading, since the two are listed separately. Being "in charge" of a vehicle while over the limit is treated as a separate offence with different penalties, endorsed as DG40. Sitting in a parked car with the keys is one example. Drivers in England and Wales must stay below a benzoylecgonine legal limit of 50 micrograms per litre of blood (µg/L). The cocaine limit is lower, at 10 µg/L. The government adopted a zero-tolerance approach for illegal drugs such as cocaine. It set limits at a level that rules out accidental exposure, not at a level linked to impairment. Laboratories report results as "not less than" a figure, to allow for measurement uncertainty, so the limit should never be treated as a "safe" amount. Any recent cocaine use may put a driver over the limit. Yes. To secure a conviction for the section 5A offence, the prosecution only has to prove that you were driving and that your blood level was above the specified limit. It is not required to show your driving was affected. There is a separate offence of driving while unfit through drugs under section 4 of the Road Traffic Act 1988, and that offence requires evidence of impairment. Some drivers are investigated for both, so it is important to check which offence you face. Police can carry out a roadside preliminary drug test. It uses a saliva swab and screens for cocaine and cannabis. A positive screen by itself cannot lead to your conviction, but it does allow the police to arrest you. At the police station, your blood sample is taken by a doctor or healthcare professional, and it is then sent for laboratory analysis. If you ask for part of the sample when it is taken, the law requires the sample to be divided and a part provided to you for independent testing. Results can take weeks or even months to arrive, which explains why many drivers are released while they wait. Received a charge, or a blood result that shows BZE? Drug Driving Solicitors can review your paperwork and explain the options in front of you. Such cases are heard in the magistrates' court. If convicted, you face a mandatory disqualification of at least 12 months, an unlimited fine and up to six months' imprisonment. If you have been convicted of a relevant drink-driving or drug-driving offence within the ten years before this one, the minimum ban is three years. The conviction goes on your licence under the endorsement code DG10, which stays on your driving record for 11 years from the date of conviction. It is a criminal conviction as well, not simply a motoring matter. In practice, much higher insurance premiums for years can follow. Drivers who use a vehicle for work should know their employer will be able to see the conviction on their licence. Take specialist advice before your first court hearing. Early decisions, how you plead included, can affect the outcome. A solicitor may examine whether correct procedures were followed, how your blood sample was taken, stored and analysed, and whether the evidence that you were driving is sound. When deciding the sentence, the court can take into account that drugs were consumed unknowingly, for example through a spiked drink. Strong mitigation may still influence the fine and the length of the ban above the minimum, even where a conviction is likely. Every case depends on its own facts, so no particular outcome is guaranteed. Benzoylecgonine can remain in your blood after cocaine wears off. Whether or not you felt impaired, a reading above the limit is enough to lead to a charge. The penalties are serious, though the outcome may be affected by how your case is prepared. Anyone who has been charged, or who is waiting for blood test results, can speak to Drug Driving Solicitors for clear advice on their situation. This article is general information about the law in England and Wales. It is not legal advice, so please seek advice on your own circumstances. In most cases, yes. A ban begins at the point of sentencing, so being charged does not usually prevent you driving. If the court convicts you but delays sentencing, it may impose an interim ban in the meantime. Yes, it is. Driving above the specified limit is a criminal offence and not only an endorsement. The DG10 code also stays on your driving record for 11 years from the date of conviction, and it will be seen by employers who check your licence. Not at present. Drug driving has no national equivalent to the drink-drive rehabilitation course, the course that can shorten some drink-driving bans. Prison is possible but is uncommon. Under the Sentencing Council guideline, custody is the starting point only in the most serious category, for example driving commercially or with alcohol or another drug in the blood, combined with poor driving or obvious impairment. For this purpose, cocaine and BZE detected together count as one drug. Drug Driving Solicitors is a specialist law firm handling drug driving cases across England and Wales. If you have failed a roadside drug test and want to understand your position, call us for a free initial consultation or visit drugdrivingsolicitors.co.uk. Early advice costs nothing, and can make all the difference to the outcome of your case.
Benzoylecgonine and Driving Explained: 8 Things to Know for 2026
1. The meaning of benzoylecgonine
2. Why benzoylecgonine is detected after cocaine wears off
3. Is it against the law to drive with BZE in your blood?
4. The benzoylecgonine legal limit in England and Wales
5. Can a driver be convicted of drug driving if not impaired?
6. The way police test for cocaine and BZE
7. The penalties for a DG10 drug-driving conviction
8. What you can do after being charged
Get help with a benzoylecgonine drug-driving charge
Frequently asked questions
Am I able to drive before my court hearing?
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Is prison a risk if I drive over the BZE limit?
