RSO Rick Simpson Oil explained by a DC budtender — dosing, benefits, and how it’s made. Full spectrum cannabis for serious relief. Visit MrGreen DC on Connecticut Ave.
● mrgreendc.com
4302 Connecticut Avenue NW, Washington DC
RSO Rick Simpson Oil is probably the most misunderstood product on our shelves — and it’s also the one that changes the most lives. I had a patient walk in a few months ago, a retired government worker from Dupont Circle who’d been dealing with stage 3 cancer. She’d tried edibles, tried tinctures, tried everything her oncologist would allow alongside treatment. Nothing moved the needle on her nausea or appetite. Two weeks on RSO and she called the shop to say she’d gained four pounds and slept through the night for the first time in months. That’s not unusual. This full spectrum cannabis extract is specifically designed for people who need serious, sustained relief — not a casual buzz. If you’ve been curious about cannabis oil syringes, how they’re made, how to dose them safely, and whether they’re right for your situation, you’re in the right place.
What Exactly Is RSO Rick Simpson Oil — and Why Is It Different from Other Cannabis Oil?
RSO is a thick, dark, full spectrum cannabis extract that comes in a syringe (not for injecting — just for measuring precise doses). It was originally popularized by a Canadian named Rick Simpson, who claimed it helped with his own skin cancer back in 2003. Now, I’m not here to make medical claims. But I can tell you that RSO has become one of the most requested products at our medical dispensary in Washington DC, especially among patients dealing with chronic pain, cancer side effects, and serious autoimmune conditions.
What makes RSO different from a standard cannabis tincture or distillate cartridge? It’s the “full spectrum” part. Most concentrates strip away everything except THC. RSO keeps the whole plant profile intact — cannabinoids like THC, CBD, CBN, and CBG, plus terpenes like myrcene, caryophyllene, and linalool. That combination matters because of the entourage effect, where all those compounds working together produce stronger relief than any single one alone. A distillate cart might hit 90% THC, but it’s a one-note song. RSO is the whole album.
The consistency is thick and dark, almost like molasses. It doesn’t look pretty. It doesn’t taste great. But medical cannabis DC patients aren’t buying it for Instagram — they’re buying it because it works.
How RSO Is Made: Cannabis Decarboxylation and Extraction Explained
Understanding how RSO is made helps you understand why it’s so potent. The process starts with raw cannabis flower, usually a strain high in THC and rich in terpenes. That flower gets soaked in a solvent — traditionally ethanol, sometimes isopropyl alcohol — which strips the cannabinoids, terpenes, and plant waxes from the plant material.
After soaking, the liquid is strained and the solvent gets slowly evaporated off using low heat. This is also where cannabis decarboxylation happens. Raw cannabis contains THCA, which doesn’t get you high and isn’t particularly bioavailable. The heat converts THCA into active THC, making the oil ready to eat, apply topically, or dose sublingually right out of the syringe. No lighter needed. No vape pen required.
Here’s the thing: not all RSO is created equal. Quality depends on the starting material, the extraction process, and the lab testing that follows. At a licensed DC marijuana dispensary like ours, every RSO syringe comes with a certificate of analysis showing exactly what’s in it — THC percentage, cannabinoid profile, residual solvent testing, the works. If someone’s selling you RSO without lab results, walk away. Knowing how to read a cannabis label isn’t optional when you’re dealing with something this concentrated.
How to Dose RSO: Microdosing Cannabis for Beginners and Beyond
This is where most people mess up, and honestly, it’s where I spend the most time behind the counter. RSO is strong. A typical syringe might contain 500mg to 2500mg of THC in total. For context, a standard edible dose in DC is 10mg. So a single syringe could hold 50 to 250 individual doses. You don’t eyeball this stuff.
Start Low: The Rice Grain Rule
The standard advice — and I stand behind it completely — is to start with a dose about the size of a grain of rice. That’s roughly 5-10mg of THC depending on the syringe’s concentration. Take it once, wait at least two hours, and assess. Don’t redose because you’re impatient. RSO is an edible-style experience, meaning it goes through your liver and can take 60-90 minutes to kick in. The effects last 4-8 hours, sometimes longer.
Microdosing cannabis with RSO is actually a great strategy for new patients. You’re getting that full spectrum benefit — all the cannabinoids and terpenes working together — but at a dose low enough that you can function normally. Over 7-14 days, you can gradually increase until you find your sweet spot.
Sublingual Dosing Tips vs. Oral Ingestion
You’ve got two main options. First, you can squeeze your dose under your tongue and hold it there for 60-90 seconds. Sublingual dosing tips from my six years in the DC cannabis industry: don’t swallow immediately, don’t eat or drink for a few minutes after, and expect onset in about 15-30 minutes. It hits faster sublingually because the THC absorbs through the blood vessels under your tongue, bypassing your digestive system.
Second option — and this is what most of my patients prefer — is to put the RSO on food. Squeeze it onto a small piece of bread with peanut butter, a cracker, or into a capsule. The fat in the food helps absorption. This method takes longer to kick in (45-90 minutes) but tends to produce more consistent, longer-lasting effects. Some patients dealing with cannabis and nausea find that taking RSO with a small fatty snack actually settles their stomach better than sublingual dosing (no judgment, everyone’s body is different).
The Rick Simpson Protocol
You might have heard about the “full RSO protocol” — the idea of working up to a full gram of RSO per day over 90 days. That’s roughly 600-900mg of THC daily. I’ll be direct: that’s an enormous amount of cannabis, and it’s not something you should attempt without a real conversation with a medical professional who understands cannabis. Most of our patients at MrGreen DC use RSO at much lower doses — 25-100mg of THC daily — and get significant relief. More isn’t always better.
What Conditions Are DC Medical Patients Using RSO For?
I’m a budtender, not a doctor, so I’ll share what I see and hear rather than make clinical claims. The patients who gravitate toward RSO Rick Simpson Oil at our shop on Connecticut Avenue tend to fall into a few categories:
- Cannabis and chronic pain: Arthritis, fibromyalgia, neuropathy, back injuries. RSO’s full spectrum profile — especially strains high in caryophyllene and myrcene — seems to provide broader pain relief than isolated THC products.
- Cancer support: Patients going through chemotherapy frequently use RSO for nausea, appetite stimulation, sleep, and general quality of life. I’ve seen patients from Capitol Hill to Shaw come in specifically because their oncologist quietly suggested they look into it.
- Severe insomnia: A small RSO dose with dinner, and some patients report the best sleep they’ve had in years. The presence of CBN (which develops as THC ages) in many RSO formulations makes it naturally sedating.
- Autoimmune and inflammatory conditions: Crohn’s, lupus, MS. The combination of THC, CBD, and anti-inflammatory terpenes like pinene gives RSO an edge over single-compound products.
Honestly, the most common question I get behind the counter is “why haven’t I heard of this before?” The answer is simple: RSO doesn’t get the marketing budget that vape pens and gummies get. It’s not flashy. But for serious medical conditions, it’s often the most effective form of cannabis available at any cannabis dispensary in DC.
What Forms of Cannabis Are Sold in DC — and How RSO Compares
DC medical dispensaries carry a lot of options. Flower, pre-rolls, vape cartridges, edibles, concentrates, tinctures, topicals — the list keeps growing. So where does RSO fit?
Think of it this way: if a cannabis tincture is a glass of wine, RSO is a barrel-proof bourbon. Both have their place. A Motorbreath tincture is great for patients who want moderate, easy-to-dose relief with a dropper. RSO is for patients who need higher potency, a fuller cannabinoid profile, or who’ve found that lighter products just don’t cut it anymore.
RSO is also more cost-effective per milligram of THC than most other products. A 2500mg RSO syringe gives you serious value compared to buying the equivalent in edibles or tincture. For patients on fixed incomes — and I talk to plenty of them — that math matters.
Getting Your DC Medical Cannabis Card Through ABCA
If you’re reading this and thinking “I don’t even have a card yet,” good news: it’s one of the easiest things you’ll do all week. DC uses a self-certification process through the ABCA medical cannabis program. You don’t need a doctor’s visit. You don’t need a diagnosis letter. You don’t pay a fee. If you’re 21 or older, you go to the ABCA website, self-certify that you have a qualifying condition, and you’ll receive your temporary card (seriously, about two minutes).
Look, I know the hesitation. A lot of patients — especially those working in government or federal-adjacent jobs here in DC — worry about their employer finding out. ABCA does not share your patient data with employers, federal agencies, or anyone else. Your registration is protected. Zero career risk. I’ve registered patients who work two blocks from the Capitol, patients who commute from Logan Circle to federal buildings every morning. They’re all fine. The privacy protections are real, and ABCA enforces them strictly.
Once you’ve got your card, you can walk into any licensed medical dispensary in DC and purchase RSO, tinctures, flower, edibles — whatever form works for your condition. You can also get cannabis delivery straight to your door.
RSO Rick Simpson Oil isn’t for everyone — and that’s fine. But for DC medical patients dealing with real pain, tough diagnoses, and conditions that haven’t responded well to other treatments, it’s one of the most powerful tools available at a licensed dispensary. If you’ve got questions about dosing, strain selection, or whether RSO is the right fit for your situation, our team at MrGreen DC on Connecticut Avenue NW is here for that conversation. Come see us in person, browse our cannabis menu online, or order same-day delivery anywhere in DC — from Dupont Circle to Navy Yard and everywhere in between. And if you want to start with the product that started this whole conversation, grab a 500mg RSO syringe and begin with a grain of rice. You’ll know within a week whether this is the one for you.