It worked for a while. Now it does not — or it never quite did. In twenty years and more than ten thousand patients, almost every case I see traces back to one of three failure modes. None of them means cannabis is wrong for you.
In most cases it is not the medicine failing. It is the protocol. The three most common causes are tolerance built by a stable daily dose, a delivery method mismatched to the symptom you are actually treating, and a dose that has drifted past your own biphasic turning point — the level above which cannabis begins doing the opposite of what you wanted. All three are fixable without abandoning treatment.
Cannabis is biphasic. Below a certain dose it relaxes; above it, in many people, it agitates. Below a certain dose it relieves pain; above it, it can sensitise. The curve turns over, and the turning point is different for every person and often for every symptom.
Here is why this is so easy to miss. The instinct when relief fades is to take more. If you were already near your turning point, taking more moves you past it — so the result is worse, which reads as “it stopped working”, which prompts more again. Patients can spend months climbing a curve in the wrong direction.
What to test: hold everything else constant and go down — meaningfully, not by a token amount — for four to five days. If some function returns, you were over the top of the curve, and the fix is a lower steady dose rather than a higher one.
Onset and duration are properties of the delivery method, not of the plant. Inhalation arrives in minutes and fades in a couple of hours. Oral arrives in thirty to ninety minutes and lasts far longer. Sublingual sits between them.
So a patient using an edible for breakthrough pain is waiting an hour for relief they needed immediately — and concluding it does not work. A patient vaping for all-night sleep is waking at 3am — and concluding it does not work. In both cases the cannabinoid was fine. The pharmacokinetics were wrong for the job.
What to test: write down what the symptom actually requires — fast onset, long duration, or both — before you touch the dose. Match the method to that requirement first. Surprisingly often, nothing else needs to change.
A stable dose taken at the same time every day is the most reliable way to build tolerance, because CB1 receptors downregulate under constant stimulation. Effect drops. Dose goes up. Tolerance follows the dose. The ratchet only turns one way.
What to test: tolerance is reversible, and it reverses faster than most patients expect. A structured break, or a deliberate rotation between methods and times of day, restores sensitivity — and the dose you return to is usually lower than the one you left. This is a protocol change, not a punishment, and it is worth planning with someone rather than improvising alone.
None of them is a question about which strain to buy. Every one of them is a question about structure: what dose, by what route, at what time, adjusted on what schedule, measured against what.
That structure is the thing almost no patient is given. The prescription is permission, not care — I have written about that gap at length. The practical consequence is that most patients troubleshoot alone, and the three failure modes above are exactly the sort of thing that is obvious from the outside and invisible from the inside.
Change one variable at a time and give it four to five days. Write down what you took, when, by what route, and what happened over the following six hours. Most patients who tell me it stopped working have changed three things at once and cannot tell which one mattered — and the log, not the memory, is what makes the pattern visible.
If you want to find your failure mode quickly, the free WIZDOM Self-Check is nine questions and takes about ninety seconds. If you would rather work it through properly with someone, that is what Discovery Week is for.
Please read this part. This is patient education, not medical advice, and I am not a physician. It is written from twenty years of clinical education work and patient coaching, not from a controlled trial. Do not change a prescribed regimen — cannabis or anything else — without talking to your prescriber, particularly if you take other medications. If something is getting worse, that conversation should happen now rather than after another experiment.
The free WIZDOM Self-Check is nine questions, takes about ninety seconds, and sends you a personalised four-document toolkit.
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