A typical cannabis RSO oil dosage starts at 5 to 10 mg of THC, which is roughly a quarter to half the size of a short grain of rice. Wait at least two hours before taking more, then increase in small steps only if the effects feel too weak. Because RSO is usually 60% to 90% THC, a full rice-grain dose can deliver 25 mg of THC or more, well above the 10 mg per serving standard used by state cannabis programs.
How much THC is in a rice-grain dose of RSO?
A short grain of rice of RSO weighs about 25 mg. At 70% THC, that single grain carries roughly 17 mg of THC, and a rounded grain can push past 30 mg.
- Quarter grain: about 4 to 5 mg THC (true beginner dose)
- Half grain: about 8 to 10 mg THC (standard starting dose)
- Full grain: about 17 to 25 mg THC (experienced users only)
- Pea-sized amount: 50 mg THC or more (high tolerance only)
Percentages vary by batch, so check the label. A 1 mL syringe usually holds about 700 to 900 mg of oil, which is dozens of doses, not one.
How long does RSO take to kick in?
Swallowed RSO typically takes 30 minutes to 2 hours to produce noticeable effects, and peak effects can arrive at the 3 to 4 hour mark. That delay is the main reason people accidentally overdo it. Set a timer and commit to waiting a full two hours before redosing.
How do you increase an RSO dose safely?
- Start with 5 mg THC or less on a day when you have no obligations.
- Record the dose, the time, and how you felt at 2, 4, and 6 hours.
- Keep the same dose for two or three sessions before adding more.
- Increase by 2.5 to 5 mg at a time, never by doubling.
Raising the dose slowly limits anxiety, grogginess, and next-day fog. Most people find a stable range within two to three weeks.
What should you do if you take too much RSO?
Overconsumption is uncomfortable but rarely dangerous. Expect racing thoughts, dry mouth, fast heartbeat, and heavy sedation for several hours.
Stay calm, drink water, and rest somewhere safe. Do not take more cannabis, alcohol, or stimulants to balance the effects. Seek medical help if you have chest pain, severe vomiting, or thoughts of self-harm.
Does RSO tolerance build quickly?
Daily RSO use raises tolerance within a week or two, which pushes doses upward. Taking one or two days off each week helps keep the dose low. Tolerance also drops fast, so restart at a lower dose after any break longer than a few days.
Who should be cautious with RSO?
New users, older adults, and anyone taking sedatives, blood thinners, or antidepressants should begin at the lowest end of the range and check with a clinician. RSO is not recommended for people under 21 or anyone who is pregnant or breastfeeding.