The short version

If I had chronic pain and one shot at picking a cannabinoid, I'd start with a microdose of THC. Not a big edible. Not a joint. Somewhere around 1 to 2.5 mg, taken at night, and I'd hold it there for a week before touching the number. CBD comes second for me, and it's a real second, not a consolation prize. It just does a different job.

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That ranking isn't a vibe thing. The evidence for THC-dominant cannabis in chronic pain is stronger than the evidence for isolated CBD. The 2017 National Academies review found substantial evidence that cannabis relieves chronic pain in adults. CBD on its own? The reviews keep landing on promising but thin, mostly small trials, mixed results, and no clear dose-response.

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Why low-dose THC gets my first pick

Chronic pain isn't one thing. Nerve pain, arthritis, old injuries, back stuff that never fully healed. THC hits CB1 receptors in the nervous system, which is where a lot of that pain signaling lives. Microdosing is how you get that effect without being high enough to hate it.

What Is a Good THC Microdose for Beginners?

What I look for in a microdose:

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  • 1 to 2.5 mg THC per serving, printed on the label, not guessed
  • Edibles over smoking for pain that lasts all day, because the effect runs 4 to 8 hours instead of 1 to 3
  • A 1:1 THC-to-CBD ratio if anxiety rides along with the pain
  • A consistent, lab-tested batch. Legal market products carry that info on the package

The selling point of microdosing is that you stay functional. You sleep better. The pain gets quieter. You don't wake up groggy or spend the evening narrating your own thoughts.

Where CBD actually earns its place

CBD doesn't bind CB1 directly. It nudges other targets and slows the breakdown of your own endocannabinoids, which is why it feels subtle. For chronic pain, I think of it as a background layer, not a rescue tool.

It's the better first choice if:

  • You can't use THC for reasons like drug testing at work, a history of psychosis, or bad reactions to being high
  • You want daytime coverage without any impairment
  • Your pain is localized and a topical CBD balm can actually reach it
  • You're stacking it with a low THC dose and want to smooth the edges

Dose matters here. 5 mg of CBD does close to nothing for pain. Realistic starting points sit closer to 25 to 50 mg, sometimes more, taken daily for a couple of weeks before you judge it. That gets expensive. It's a real downside and I won't pretend otherwise.

Head to head

  • Onset: CBD topicals 15 to 30 minutes, CBD oral 1 to 2 hours, THC edible 1 to 2 hours, vaped THC within minutes
  • Duration: CBD 4 to 6 hours, THC edible 4 to 8
  • Impairment: CBD none, THC yes once you push past a few milligrams
  • Evidence for pain: THC-containing cannabis moderate to substantial, CBD limited
  • Cost per month: CBD usually higher, because you're taking ten times the milligrams
  • Drug interactions: CBD is the bigger concern. It ties up liver enzymes and can raise levels of blood thinners, some seizure meds, and others

If I were buying today

First pick: a low-dose THC edible at 2.5 mg, ideally with 2.5 mg CBD alongside it. Take it two hours before bed. Give it five nights before you decide anything.

Options after that, in the order I'd try them:

  1. 1:1 THC to CBD edible, 5 mg each, for days when the pain spikes
  2. CBD-dominant tincture, 25 to 50 mg, morning and evening, if THC is off the table
  3. THC vape pen for breakthrough pain you need gone in ten minutes
  4. CBD topical for knees, hands, and shoulders, which is a cheap way to test whether CBD does anything for you at all

Things worth saying out loud

Neither one replaces your pain management plan. Talk to your doctor, especially if you're on blood thinners, seizure meds, or anything that carries a grapefruit warning. Start low, go slow, and keep notes. Strain reviews won't tell you what your body does with 1 mg versus 4 mg.

And be honest about what working means. A microdose that drops your pain from a 7 to a 5 and lets you sleep is a win. Waiting for zero is how people end up taking too much and quitting.