Medical Cannabis Tincture Dosing: Start Low, Go Slow
A practical guide to medical cannabis tincture dosing: starting milligrams, sublingual timing, titration steps, and how to track effects safely.
Short answer
A tincture often fails at one dropper. Start at 1 mg to 2.5 mg THC. Hold the liquid under your tongue for 60 to 90 seconds. Wait 2 hours before you judge the dose. If you feel nothing, add 2.5 mg at the next session, not the same one. Do not add a second dose 30 minutes after the first.
Common dose ranges
- 1 mg to 2.5 mg THC: starting dose for a first oral product.
- 5 mg THC: one serving in most legal US markets.
- 10 mg THC: per-serving cap in Colorado and several other states.
- 20 mg THC and above: range for users with high tolerance.
The FDA label for dronabinol, a synthetic THC capsule, starts adults at 2.5 mg twice daily. That number maps to oral THC, not to a full dropper of tincture.
Onset and peak
Sublingual absorption starts in 15 to 45 minutes. Swallowed tincture starts in 30 minutes to 2 hours. The CDC states that edible cannabis can take 30 minutes to 2 hours to produce effects and that users should wait before taking more. Peak effects land at 2 to 4 hours. Effects can last 4 to 12 hours.
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Why your tincture is not working
- Dose too low. A 1000 mg bottle of 30 mL holds about 33 mg THC per mL. One drop is about 0.05 mL, or 1.7 mg. Three drops is 5 mg.
- You swallowed it. The liver converts swallowed THC to 11-hydroxy-THC. This metabolite is more potent and changes the effect. Oral bioavailability of THC is 4% to 12%.
- Tolerance. Daily use raises tolerance within 1 to 2 weeks. A dose that worked in January may not work in March.
- Wrong bottle. A CBD tincture with 0.3% THC delivers little THC. 25 mg of CBD does not act like 25 mg of THC.
- Degraded product. Heat, light and oxygen convert THC to CBN. CBN has weak psychoactive effect. Old bottles lose strength.
- Food and timing. A full stomach slows onset. It does not remove the effect.
- Enzyme differences. CYP2C9 and CYP3A4 break down THC. Genetic variation changes blood levels between people at the same dose.
How to titrate
- Pick a day with no driving and no work.
- Shake the bottle. Draw a measured dose with the marked dropper.
- Take 1 mg to 2.5 mg THC.
- Hold under the tongue for 60 to 90 seconds, then swallow.
- Wait 2 hours. Write down the time, dose and effect.
- If you feel nothing, raise the dose by 2.5 mg at the next session, not the same session.
- Repeat for 5 to 7 days. Stop when you reach the effect you want.
Signs of too much
Fast heart rate, dry mouth, anxiety, nausea and paranoia appear at high oral doses. These effects peak at 2 to 4 hours and fade over 4 to 12 hours. No fatal overdose from cannabis alone has been confirmed in the US.
What is unknown
Label accuracy varies. Independent lab tests of cannabis products have found THC content that differs from the printed number. Drop size depends on the dropper, the liquid thickness and the bottle. A dropper on one label can be 0.5 mL and on another 1 mL.