Rick Simpson Oil (RSO) is a potent, full-extract cannabis oil known for its high THC content and therapeutic potential. Named after its creator, Canadian medical cannabis advocate Rick Simpson, RSO is typically made by soaking cannabis plant material in a solvent like ethanol, which extracts cannabinoids, terpenes, and other beneficial compounds. The solvent is then evaporated, leaving behind a thick, sticky oil rich in THC, CBD, and other plant constituents. Unlike many other cannabis concentrates, RSO is designed for oral or topical use rather than smoking or vaping.
Many people use RSO for its potential to help with pain relief, appetite stimulation, sleep support, and inflammation reduction. Some patients and advocates also explore its use in cancer care, though scientific research is still ongoing and does not yet confirm it as a cure. Because it contains high levels of THC, RSO produces intoxicating effects, and dosing must be approached carefully—especially for new users. A common recommendation is to start with a tiny amount, about half a grain of rice, once or twice a day, and gradually increase as tolerance builds.
RSO can be consumed directly, added to food, placed under the tongue, or applied to the skin for localized relief. When taken orally, effects may take 30–90 minutes to appear but can last several hours. Due to its potency, it’s important to store RSO securely and keep it out of reach of children and pets.
Because cannabis laws vary widely, the availability of RSO depends on your location and local regulations. In legal states, it can be found at dispensaries in prefilled syringes or jars. If you’re considering using RSO, consult with a healthcare provider—especially if you have medical conditions or take other medications—to ensure safe, effective use.