When listing off drugs you can snort up your nose, marijuana usually doesn’t make the list. But with cannabinoid-spiked nasal sprays, that’s now possible, though it might not be any different than smoking.
Homemade cannabis nasal sprays have existed on the fringes of the medical weed market for years now, but a Colorado company recently released a commercial version. Verra Wellness’s “nasal mist” comes in three ratios: 10:1 THC to CBD, 1:1, and 1:100. According to the company’s marketing material, spraying the mist up your nose allows for “increased bioavailability,” of the cannabinoids. But an expert I spoke to said there’s not much science to back up these kinds of claims.
Image: Verra Wellness Press Release
“A lot of the stuff about bioavailability and any drug tends to be kind of hype-y,” said Dr. David Casarett, the chief of palliative care at Duke University who has researched and written about medical marijuana. “If one product had a bioavailability of 50 percent over, say, 25 percent, you could use a little less but it’s not like it’s a life changer.”
Casarett told me that ingesting cannabinoids through the nasal membrane does change the way it’s absorbed because it won’t first pass through your metabolism the way it does if you smoke or eat it. But it’s also harder to predict how your body will react to the drug when it enters your system this way.
“Absorption can be varied depending on what’s going on with your nose—if you have a cold or allergies, for example,” Casarett told me.
He also noted that the nasal membrane has high concentrations of enzymes that CBD has been found to deactivate, causing the body to temporarily not be able to metabolize other drugs, including THC. All of this means that it’s tricky to predict