What Is RSO (Rick Simpson Oil) and How Does It Work in a Patch?

What are RSO patches? If you’ve seen “RSO” on a cannabis product and weren’t sure what it meant, here’s a straightforward explainer — what it is, where it comes from, and why it’s used in transdermal patches specifically.

What RSO actually is

RSO stands for Rick Simpson Oil, named after the Canadian engineer who popularized it in the mid-2000s as a full-plant cannabis extract. Unlike many concentrates that isolate a single cannabinoid. RSO is made using a solvent-based extraction process that pulls out a broad range of the plant’s compounds — THC, CBD, and other minor cannabinoids and terpenes. This results in a thick, dark, full-spectrum oil.

The key word is full-spectrum: RSO isn’t purified down to one compound. It reflects a wider profile of what the cannabis plant naturally produces.

Why “full spectrum” matters

Many researchers and cannabis users point to something called the entourage effect — the idea that cannabinoids and terpenes may work better together than any single compound does in isolation. Whether or not the entourage effect is fully proven in a clinical sense.

It’s the reasoning behind why full-spectrum extracts like RSO are popular with people looking for a broader-spectrum experience rather than an isolated THC or CBD product.

How RSO works in a transdermal patch

A dab patch formulated with RSO delivers that full-spectrum extract steadily through the skin over 8–12 hours, rather than all at once. Compared to other consumption methods:

• Vs. smoking/vaping RSO directly: the patch avoids inhalation entirely and spreads the same extract’s effects out over many hours instead of minutes.
• Vs. THC-isolate patches: RSO patches carry the broader cannabinoid and terpene profile of the whole extract, not just THC alone.
• Vs. edibles containing RSO: transdermal delivery skips the digestive system and liver metabolism entirely, which changes both onset time and how consistently the dose is delivered.

If you want to experience full-spectrum relief without inhalation, you can buy our RSO Transdermal Patch online.

What to expect

Because RSO patches are typically THC-inclusive, expect psychoactive effects similar to other THC transdermal patches — a gradual, steady build over the first hour or two rather than a sudden onset. Effects are commonly described as more full-bodied or “grounded” compared to isolate-based products, which is consistent with the broader compound profile RSO carries.

Who tends to use RSO patches?

RSO has a following among people looking for a more complete, whole-plant experience rather than a single-cannabinoid product — often people already familiar with cannabis who want the depth of a full-spectrum extract without smoking or dealing with edible dosing guesswork.

If you’re brand new to cannabis products generally, starting with a lower-THC or CBD-dominant patch and working up is usually the more comfortable entry point before trying a full-spectrum RSO patch.

Quality matters more with RSO than most extracts

Because RSO concentrates the whole plant, extraction quality and lab testing matter even more than with isolate products; residual solvents, pesticides, or contaminants in the source material carry through into the final oil. Always check for a current Certificate of Analysis (COA) before buying an RSO product from any brand.

This page is for general educational purposes and isn’t medical advice. If you have questions about how RSO or full-spectrum cannabis products may interact with a medical condition or medication, talk to a healthcare provider.