Quick answer
No single medical cannabis dose works for every case of neuropathic pain. Clinical trials use a wide range of THC and CBD amounts, and response varies by person. Standard guidance: start low, hold the dose steady for several days, then increase in small steps until you get relief or side effects. Common starting points are 1 to 2.5 mg THC and 5 to 20 mg CBD per dose. A clinician who knows your history should direct the plan.
Prerequisites
- A diagnosis of neuropathic pain from a clinician.
- A medical cannabis recommendation or certification valid in your state, if required.
- A list of current medications, including opioids, gabapentinoids, antidepressants, and blood thinners.
- A product label that lists THC, CBD, and other cannabinoid amounts per unit in milligrams.
- A dosing log.
Step-by-step titration
- Pick one product and one route. Oral oils and capsules give longer, steadier effects. Inhaled forms act within minutes.
- Record a baseline pain score from 0 to 10. Note sleep and function.
- Start with 1 to 2.5 mg THC and 5 to 20 mg CBD once per day. Take it in the evening if sedation is a concern.
- Keep the dose the same for 3 to 7 days.
- If pain is unchanged and side effects are mild or absent, increase THC by 1 to 2.5 mg and CBD by 5 to 10 mg.
- Repeat the hold-and-increase cycle no more than once every 3 to 7 days.
- Stop increasing when you reach a 30 percent or greater drop in pain, or when side effects appear.
- Hold at the lowest dose that keeps the benefit.
CBD to THC ratios
Ratios matter more than total milligrams for many people. High-CBD, low-THC products (for example 20:1 or 10:1 CBD to THC) reduce intoxication risk and suit daytime use. Balanced products (1:1) may help sleep and severe pain but carry stronger psychoactive effects. Some patients find that CBD alone offers little relief for neuropathic pain. Others tolerate only low THC amounts.
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Route and onset
- Inhaled vaporized flower or concentrate: onset 1 to 10 minutes, duration 2 to 4 hours. Easier to titrate, harder to keep steady.
- Oral oil or capsule: onset 30 to 120 minutes, duration 6 to 12 hours. Effects depend on food and liver metabolism.
- Sublingual tincture: onset 15 to 45 minutes, duration 4 to 8 hours.
- Topical: no systemic absorption in most cases, so it does not follow the same dosing rules.
What to track
Log dose, time, pain score, sleep hours, mood, and side effects such as dizziness, dry mouth, drowsiness, or anxiety. Bring the log to follow-up visits. Patterns take 2 to 4 weeks to appear.
Safety notes
Do not drive after THC. Avoid alcohol and sedatives on dosing days. Cannabis can raise heart rate and interact with warfarin, some anticonvulsants, and drugs processed by CYP450 enzymes. Stop and call a clinician for chest pain, fainting, severe confusion, or a racing heartbeat. Keep products locked away from children and pets.
Legal context in the US
Medical cannabis is legal in many states but remains illegal under federal law. Rules on possession limits, product types, and dispensary access differ by state. Buy from licensed sources so labels are accurate.