INTRODUCTION
Is it permissible to drive a car after consuming CBD or THC? The answer isn't quite that simple, because while CBD is not banned in itself, is there Clear legal limits for THC in road traffic. Anyone who doesn't follow the rules risks fines or even having their driving licence revoked.
Cannabis and driving in Switzerland: key points at a glance:
✅ CBD is generally permitted, but impaired driving ability can still be problematic.
✅ THC is prohibited when driving – A strict zero-tolerance policy applies.
✅ CBD Cannabis With up to 1% THC, traces may be found in the blood, which is why a waiting period of 24 hours is recommended.
✅ THC from flowers with higher THC levels remains detectable for up to 72 hours.
✅ The police are not permitted to carry out THC tests arbitrarily; they must have specific grounds for suspicion.
WHAT YOU WILL LEARN IN THIS ARTICLE:
📌 CBD and driving – When is it permitted? What are the risks?
📌 How long should you wait after consuming CBD products containing THC?
📌 THC and driving – How long does THC remain detectable?
📌 How does THC break down in the body?
📌 What are the penalties for an inspection?
But first things first. In the following sections, you’ll find detailed information on what to look out for when CBD and be aware of the effects of THC when driving.
DRIVING AND CBD
As mentioned at the outset, there is no official limit for CBD (cannabidiol) in road traffic. The consumption of CBD is therefore not, in principle, prohibited when driving. This means that the consumption of pure CBD products is not problematic in itself from a legal perspective. However, this does not mean that you can still drive a vehicle in every case after taking pure CBD. As with medications (for which driving is not explicitly prohibited) or with fatigue, Everyone must judge for themselves whether they are still fit to drive.
The Road Traffic Act (SVG) is clear on this point: «Every driver must possess the necessary physical and mental capacity; otherwise, they are unfit to drive.» According to TCS Switzerland, this means: «If you have the slightest doubt, keep your hands off the wheel.» – www.tcs.ch/de/testberichte-ratgeber/ratgeber/unfallursachen/medikamente.php
How long after consuming CBD products can I drive?<1% THC)
Although consuming pure CBD is unproblematic, many Legal CBD cannabis products In Switzerland, up to 1% THC. Following the consumption of such CBD products, trace amounts of THC may be detected in the blood, which could affect a person’s fitness to drive.
It is recommended that after consuming CBD products with up to 1% THC at least 24 hours to wait before driving again. This ensures that the THC level in the blood falls below the legal limit. Although the levels of THC are low and it is unlikely to impair driving ability, the law imposes a strict zero-tolerance policy on the roads, which is why any detectable amount of THC could become a problem, as will become clear later in the text. In conclusion, therefore:
How long not to drive after CBD? If you want to be on the safe side, in the case of CBD products with up to 1% THC, wait 24 hours to be on the safe side.
📢 But important: The police are not permitted to carry out random THC blood tests during a stop. What’s more, to carry out a THC test, officers would have to take you to hospital to have a blood sample taken. To do this, they need concrete grounds for suspicion. These could include red eyes, slurred speech, cannabis found in the car, or other factors indicating cannabis use. However, anyone who behaves normally, does not feel impaired and feels fully capable of driving has little to fear, even if stopped for a check after consuming CBD cannabis.
CONCLUSION CBD WEED AND DRIVING:
The consumption of pure CBD (cannabidiol) is not, in principle, prohibited whilst driving. However, anyone who feels tired or otherwise impaired in any way after consuming CBD should under no circumstances get behind the wheel!
DRIVING AND THC
The situation is different for THC than it is for CBD. In the case of THC, the law does not take into account whether you still feel fit to drive. THC is strictly forbidden in road traffic. By law, there is a zero-tolerance policy. The detection limit for THC is 1.5 micrograms per litre of blood. This limit is very low. Discussions are currently under way regarding a relaxation of this limit. Among others, the FOPH (Federal Office of Public Health) is calling for this limit to be relaxed: https://www.srf.ch/news/schweiz/grenzwert-statt-nulltoleranz-mehr-nachsicht-mit-cbd-konsumenten-im-strassenverkehr
At present, however, the low limit for the consumption of products containing THC essentially means: Do not drive after taking the medicine. If the detection limit for THC in the blood is exceeded during a check, this can have serious consequences, leading to fines and the revocation of one's driving licence.
HOW LONG NOT TO DRIVE AFTER THC WEED (APPROX. 18% THC)
Unlike legal CBD products Weed containing THC has significantly higher levels of THC, which can impair a person’s fitness to drive. THC cannabis containing approximately 18% THC can be consumed up to 72 hours or remain detectable in the blood for longer, particularly with heavy or regular consumption.
After consuming cannabis containing 18% THC, it is recommended that you wait at least 48 to 72 hours wait until the THC has largely broken down.
So, how long can you not drive after THC? With strong THC cannabis, the waiting time is definitely longer, and regular consumers should even allow more time before driving again.
CONCLUSION THC WEED AND DRIVING A CAR:
The consumption of THC (Tetrahydrocannabinol) is prohibited while driving. Anyone consuming THC-containing products should therefore generally not get behind the wheel afterwards!
Additional information for interested parties:
HOW DOES THE BREAKDOWN AND METABOLISATION OF THC WORK
To understand how long you should not drive after consuming THC-containing cannabis, it's important to consider how THC works in the body and understand the breakdown process. The following derivation of calculations.
1. CONSUMPTION OF THC
An average joint contains approximately 0.3 to 0.5 grams of cannabis. With a THC concentration of 18% does that mean a joint is approximately 54 to 90 milligrams of THC contains.
2. THC UPTAKE IN THE BODY
The bioavailability of THC when smoked is approximately 30%. This means that only around one-third of the consumed THC actually enters the bloodstream. For a joint with 0.5 grams of cannabis (90 mg of THC), approximately 27 mg THC actually absorbed into the bloodstream.
3. METABOLISATION OF THC IN THE BODY
After absorption into the bloodstream, THC is broken down relatively quickly in the liver into various metabolites. The main metabolite is THC-COOH, which is excreted in the urine. THC itself, however, has a half-life of about 1 to 4 hours in the blood, whereby the concentration drops relatively quickly.
4. REDUCTION OF THC BELOW THE LIMIT VALUE OF 1.5 MICROGRAMS PER LITRE OF BLOOD
The legal limit in Switzerland is 1.5 micrograms of THC per litre of blood. After smoking a joint containing 90 mg of THC and absorbing around 27 mg of THC, the THC level in the blood would initially rise to approximately 100 to 200 micrograms per litre of blood to increase (depending on various factors such as metabolism and body weight).
To fall below the limit of 1.5 micrograms per litre, THC needs to be broken down over several hours or days. With a half-life of 1 to 4 hours, the THC level in the blood can be roughly estimated. After approximately 8 to 12 hours the THC content has fallen significantly, but is probably still above the limit. Only after 24 to 72 hours, depending on an individual’s metabolism and the amount consumed, the THC level falls below the limit of 1.5 µg/L in most cases.
5. THC INFLUENCE ON THE ABILITY TO DRIVE
While the THC content in the blood plays a crucial legal role, it should be emphasised that the blood value alone does not always reliably correlate with actual fitness to drive. In fact, many users are completely clear-headed and fit to drive again only a few hours after consuming THC, even though the THC level in the blood is still above the legal limit.
The psychoactive effects of THC are often only noticeable in the first few hours after consumption. After that, most users feel normal again and are fully capable of carrying out their usual activities – including driving a car. However, despite the decrease in effects, THC residues can remain detectable in blood or urine for longer. This means that in practice, one can feel fit to drive again for a long time, while the THC blood level is still above the permissible limit. There are also enough bizarre cases in Switzerland that illustrate this: Stopped smoking cannabis – tested positive anyway | Observer
It is therefore important to understand that while the legal limit is intended to minimise risk, it does not always reflect the individual reality for consumers. Nevertheless, if you want to be on the safe side, it is legally necessary to observe this limit in order to avoid fines or the loss of your driving licence.
(Important: However, it should also be pointed out here that the police cannot or may not arbitrarily carry out checks for THC in the blood. Without specific grounds for suspicion, the police have no reason to test you for THC in your blood the day after you may have consumed cannabis, and provided you feel fully fit to drive (and are not carrying any cannabis or other suspicious items), you are unlikely to be stopped for a test.)
(These half-lives are a conservative estimate based on average metabolic rates and THC consumption. However, individual differences (metabolism, body fat percentage, frequency of use) may prolong the half-life.)
CBD products in the shop with THC
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1 PREROLLED JOINT BANANA DIESELCHF7.90 -
SWEET STARPreisspanne: CHF21.00 bis CHF54.00
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CBD OIL ENTIRE (24% CBD)CHF119.00
CBD products in the shop without THC
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CBD OIL PURE (16% CBD)CHF89.00
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CLOUD NINECHF19.90
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CANNA LOTIONCHF39.90
