RSO Oil Dosage for Pain: A Start-Low Titration Guide

The top pick for a starting point is a full-extract syringe with the THC percentage printed on the package, dosed in the evening in fractions of a rice grain, and raised only after three days with no unwanted effects. A fixed number cannot be the answer because RSO runs from roughly 30% to 80% THC by weight, so the same size grain can carry three times the THC from one batch to the next. Four criteria decide the number: label transparency, batch consistency, your existing cannabis tolerance, and the other drugs you take.

Why there is no single RSO number

RSO is a whole-plant extract, not a standardized medicine. Two syringes that look identical can differ in THC, CBD, and minor cannabinoid content. Add body weight, liver enzyme activity, and how much you ate before dosing, and the same milligram produces very different effects in two people. Treat any dose you read online as a starting point for a test, not a target.

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Step 1: Do the THC math

Convert the label into milligrams per milliliter. THC percentage times 10 gives mg per mL. A 70% THC oil holds about 700 mg THC per mL. From there, dose in milligrams, not in grains:

Desired mg THC divided by mg per mL equals the volume to draw.
A small grain of dry rice holds roughly 0.02 to 0.05 mL, which at 700 mg per mL is 14 to 35 mg THC. That is far above a novice starting dose.
To measure small amounts, dilute a known volume. Mix 0.1 mL of oil into 9.9 mL of olive oil and you have 10 mL at about 7 mg per mL, so a 1 mL dropper equals 7 mg THC.

Step 2: The start-low schedule

Days 1 to 3: one dose of about 2.5 to 5 mg THC, taken in the evening when you do not need to drive or work.
Days 4 to 6: if you felt nothing unpleasant, add 2.5 to 5 mg to the same single dose.
Every three days after that, add 2.5 to 5 mg until pain relief arrives or side effects do.
Stop at the lowest dose that helps. That becomes your maintenance dose.

If you already use cannabis daily, your starting point can sit higher, often 10 to 20 mg THC. If you have never used it, start at the bottom of the range.

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Step 3: Respect onset and duration

Swallowed cannabis oil is slow. Onset runs 30 to 120 minutes, peak effect lands around 2 to 4 hours, and the total window lasts 6 to 8 hours. Do not redose inside the first two hours because you feel nothing yet. Double dosing this way is the most common cause of an unpleasant night.

THC-dominant versus CBD-leaning RSO

THC-dominant extract

Pros: strongest reported effect on pain signals; small volumes are easy to measure once diluted; one dose lasts most of a night.
Cons: psychoactivity, anxiety at higher doses, impairment, dry mouth, racing heart; poor fit for daytime work.

CBD-leaning or balanced extract

Pros: little to no intoxication, easier to use during the day, often tolerated by people who dislike THC.
Cons: needs much larger volumes to match THC content; higher cost per syringe; pain relief reports are more mixed.

What shifts your dose

Tolerance: daily use raises the dose needed for the same effect.
Route: holding oil under the tongue absorbs faster than swallowing it.
Food: a fatty meal slows onset and can raise peak effect.
Body weight and liver metabolism: both change how long THC stays active.
Other drugs: opioids, benzodiazepines, muscle relaxants, and alcohol stack with THC sedation.

Use-case recommendation

For a first-time user chasing night pain, choose a labeled THC-dominant syringe, dilute it to about 7 mg per mL, and take 1 mL one hour before bed for three nights. For a daytime user with chronic joint pain and a job to keep, a 1:1 or CBD-leaning extract at 10 to 20 mg CBD with 5 mg THC fits better. For an experienced daily user, a straight extract at 15 to 25 mg THC per dose, split into an evening dose only, avoids building a tolerance you cannot afford.

Safety and interactions

High-THC oil can interact with warfarin, clobazam, valproate, and other drugs handled by CYP3A4 and CYP2C9. Do not combine it with alcohol or sedatives. People with a history of psychosis, heart conditions, or pregnancy should talk with a clinician before starting. Keep the syringe out of reach of children and pets, and store it cool and dark. Rules on buying and possessing cannabis extract vary by state.

Buying checklist

Printed THC and CBD percentages, not a vague potency range.
A batch or lot number you can trace to a lab test.
A sealed syringe with a plunger that moves smoothly and no solvent odor.
A date that tells you how fresh the extract is.