Driving with Medical Cannabis in the UK

[Hazy-Haze]

The first time I was prescribed diazepam, it was not really explained to me as I thought it was for my back pain... I drove home from work, no idea how I managed it. Never again lol

Same on that one. Driving down a dual carriageway and had to pull over as I thought I was having a migraine with vision loss. Diazepam was the cause.

Generally I know my dosing limits and I also know my absorption times and effect level. The reality is if you consume via an oral route you are always going to be medicated and probably not a small amount. With time you get used to it. If you were a safe driver to start with, you should still be so. I've always been a chill driver and I have never had a single accident in over 30 years driving. I've driven professionally for a chunk of that, in/on various vehicles without issue as well.

New post automatically merged: 18th Apr, 2026

Do let us know! I barely drive but I'd defo fail the swab, like most of us lol. Do we even know how long a swab is marking us 1g/dayish users?

Depends how fat you are, given it's fat soluble. I can tell you from personal experience, you can be high and fail a swab months after giving up if you are a heavy user. i failed three drug tests at jobs after not consuming for over 3 months and I am fat.

New post automatically merged: 18th Apr, 2026

I wouldn't take Co-Codamol and drive!

Depends if you take it all the time and it's prescribed. if you do, it likely has bugger all discernable effects on you. I have a family member who is on codeine for intermittent back pain (and no they aren't interested in joining our fraternity) and they just take it and drive. it removes the pain, but in terms of drowsiness, they say after taking it for 11 years it doesn't do it. Tolerance at a guess.

 

[Grumbleweed]

I was smiling earlier reading about things to flush ones system (yeah right) and lemon water sounds unappealing, cranberry juice will have sugar in but I do drink a coffee on a morning, and coffee's suggested, along with green tea which I dislike with a passion, Tetley tea's my usual brew and I drink a fair bit, it'll have been green once too

I reckon I'd take over a month to clean up and my BMI is 25 point something

Insulin can be bad for driving so I don't begrudge the 3 year temporary licences I've had, a low blood sugar can't carry oxygen that well, and the lower the sugar, the less O2 your brain gets, there are crashes every year due to this sadly but with tech it doesn't look hard to display the reading your phone gets on the car dash, my D clinic are happy I'm fit to drive, not long till the medical and DVLA seem to take around 3 weeks to respond, so yeah I'll post back on this either way.

 

[GrownHealth]

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[StationeryWilbury]

reality is we should have fuel derived from cannabis powering our vehicles then we wouldn't have all this wars going on but hey ho

 

[Grumbleweed]

Medical cannabis and road safety A research report for the Department for Transport

A little too long to quote so 'tl:dr' could apply, a 5 year old research document, the research is improving and although I see inaccuracies it's not that far off and I found it was an interesting read, makes one pull a few faces and mutter expletives, but it's a government commissioned report at the end of the day.

 

[Hazy-Haze]

Medical cannabis and road safety A research report for the Department for Transport

A little too long to quote so 'tl:dr' could apply, a 5 year old research document, the research is improving and although I see inaccuracies it's not that far off and I found it was an interesting read, makes one pull a few faces and mutter expletives, but it's a government commissioned report at the end of the day.

Yeah, I gave up about 33% the way through it. Was there a summary somewhere? You know a page or two of conclusive statements and analysis would have been fine, at the start. This read like a Ph.D thesis and was boring to read. i'd have to be very stoned to make it to the end (and right now am not).

 

[Grumbleweed]

Yeah, I gave up about 33% the way through it. Was there a summary somewhere? You know a page or two of conclusive statements and analysis would have been fine, at the start. This read like a Ph.D thesis and was boring to read. i'd have to be very stoned to make it to the end (and right now am not).

I read it last night when I was, so I totally agree

Talking about Ph.D thesis's, did you ever come across the book by Dr richard potter, the biologist who grew the weed GW Pharma (or whatever they're called these days) use for their Sativex, I say book but it's his thesis for his doctorate and on't interweb somewhere, he's very belittling towards recreational users even when he used seed bank seeds in his experiments and wouldn't lay out his feeds just in case a recreational grower used them, I was happy with Canna feeds, and Advanced Nutrients 'Big Bud' but the professor didn't mention them

 

[GreenRed]

I read it last night when I was, so I totally agree

Talking about Ph.D thesis's, did you ever come across the book by Dr richard potter, the biologist who grew the weed GW Pharma (or whatever they're called these days) use for their Sativex, I say book but it's his thesis for his doctorate and on't interweb somewhere, he's very belittling towards recreational users even when he used seed bank seeds in his experiments and wouldn't lay out his feeds just in case a recreational grower used them, I was happy with Canna feeds, and Advanced Nutrients 'Big Bud' but the professor didn't mention them

I am not belittling a Ph.D here but reading some of these guys' stuff in whatever topic, economy, sociology (especially stuff that has been clearly disproven since), I think the Ph.D system is easy to game and even some of the most dimwitted, outright dumb people can get it, just because they have good memory and can recite lexicons but can't form 2 coherent thoughts based on facts and data.

 

[Grumbleweed]

I am not belittling a Ph.D here but reading some of these guys' stuff in whatever topic, economy, sociology (especially stuff that has been clearly disproven since), I think the Ph.D system is easy to game and even some of the most dimwitted, outright dumb people can get it, just because they have good memory and can recite lexicons but can't form 2 coherent thoughts based on facts and data.

I have a City & Guilds craft & Advanced Craft as my trade certificates which are as valuable as my 'O' levels in the modern world so won't disagree, in fact they've written quite a few contradictions there, along with a few fallacies.

But the government commissioned the report and stuff like that influences policy sadly.