Vape pen lung injury: Here’s what you need to know


November 21, 2019


vape pen lung disease

A suspected tainted black market vape cart seized in New York. (Courtesy of New York State Department of Health)

As of Thursday, Nov. 21, the CDC has reported 2,290 confirmed and probable cases in 49 states of severe acute respiratory distress syndrome possibly associated with a recently inhaled drug aerosol (commonly known as vaping). As many as 47 patients in 25 states may have died from the condition. Here’s what you need to know.

Should I stop vaping?

What is the suspected diagnosis?

  • In many cases, symptoms and treatment mirror a condition called lipoid pneumonia, previously found in patients who inhaled mineral oil.
  • Subsequent biopsies of 17 victims indicate “airway-centered chemical pneumonitis from one or more inhaled toxic substances rather than exogenous lipoid pneumonia as such, but the agents responsible remain unknown.”
  • A third biopsy series looked similar to the first two, adding organizing pneumonia to the diagnosis cluster.
Sickened lungs show up as cloudy on the left x-ray, and clear after treatment of one suspected VAPI patient in Utah. (Courtesy University of Utah)

Sickened lungs show up as cloudy on the left X-ray, and clear after treatment of one suspected VAPI patient in Utah. (Courtesy University of Utah)

What’s causing it?

  • The contamination is emanating out of the supply chain for illicit market THC vape carts, the CDC said Oct. 30. “The latest national and state findings suggest products containing THC, particularly those obtained off the street or from other informal sources (e.g. friends, family members, illicit dealers), are linked to most of the cases and play a major role in the outbreak.”
  • There are multiple known contaminants in illicit vape carts that could cause lung injury. But on Nov. 8, the CDC announced a “very strong culprit of concern”—vitamin E oil, (aka tocopheryl-acetate). Lung fluid analyses of 29 victims from 10 states tested positive for the substance,
  • New York health authorities have confirmed that synthetic vitamin E (tocopheryl-acetate) is tainting most seized vape carts in that state. Utah officials concurred Oct. 25. Pen makers report using it because it’s a cheap thickener. The FDA is now specifically looking at tocopherols. New York has subpoenaed three thickener-makers—Floraplex, Honey Cut, and Mass Terpenes—after tests showed all three products were tocopheryl-acetate. On Sept. 13, SC Labs of California found Floraplex’s Uber Thick to be almost totally tocopheryl-acetate.
  • The FDA has received about 900 samples for testing. So far, they’ve found vitamin E acetate in 47% of the 225 THC carts tested. The FDA is testing seized carts for THC, nicotine, cutting agents called diluents, additives, pesticides, opioids, poisons, and toxins. One New York patient who tested his cart found it contained formaldehyde, pesticide, vitamin E oil, and “a little dab of THC.” The California lab Cannasafe reports ten out of ten vape carts from California illicit stores tested positive for tocopheryl-acetate, some as high as 40%. FDA testing has confirmed tocopheryl-acetate cuts of 31% to 88%, the mean average is 50%.
  • Health officials have confirmed that among the tainted carts are ones with the illicit market brand names Dank Vapes, TKO, Off White, Moon Rocks, Chronic Carts, and West Coast Carts, but the condition is linked to multiple illicit market brands across multiple states. One Tulare County, CA victim’s family member confirmed the presence of a “black and gold” cart labeled “Lucky Charms” from the brand “West Coast Cure”. (Matching that description is both counterfeit packaging and authentic packaging for a popular, illicit market brand in California called West Coast Cure.)

Why vitamin E oil?

  • As Leafly reported in early September, a new diluent known as Honey Cut entered the illicit vape cart market in late 2018. The product, which dilutes THC oil without thinning the viscosity, is manufactured by Honey Cut LLC registered to a Joshua Temple of Los Angeles. Officials at the terpene manufacturer True Terpenes, based in Portland, OR, told Leafly they tested Honey Cut earlier this year and found it to contain Vitamin E oil, aka tocopheryl-acetate. Two brands—Mr. Extractor of Oregon and Constance Therapeutics of California—told Leafly they’ve been selling forms of vitamin E oil into the vape cart market. Mr Extractor’s Drew Jones told Leafly he believes up to 40 companies sold a copycat oil, and the oil is in 60% of carts in the US. Lab tests have found the oil in multiple thickener products, including Peak Terpenes’ Thicc Stretch.

What are the symptoms?

What are the latest numbers?

  • This man-made mass poisoning event is akin to bathtub gin under alcohol prohibition. It is generally a creature of unlicensed markets where consumers have no legal alternative. It’s akin to recent Spice/K2 poisonings, as well as unregulated CBD market poisonings. The first reports came out of the prohibition state of Wisconsin, which has 52 cases, and Kings County, CA, which has banned legal access to tested cannabis, alongside 60% of local cities and counties. California has 149 cases and three suspected deaths (in L.A., Tulare, and Kings County). Illinois has 166 sick and one death. New York reports 156 cases and a death. Texas has 165 confirmed cases. Kansas reports two suspected deaths. Minnesota has 97 cases. Missouri reported one related death Sept. 19, and 22 possible cases. Florida reported 78 illnesses and a death Oct. 25. Georgia reported a death Sept. 25. On Sept. 30, Nebraska reported a May death that appears to fit the CDC’s criteria. New Jersey and Virginia reported a death Oct. 1. Alabama reported a death Oct. 2. Delaware reported a death Oct. 3. Officials also reported deaths in Massachusetts, and New York.
  • Injury rates could be leveling off, or declining, the CDC said Oct. 25.
  • In contrast, Oregon has two suspected deaths and 14 suspected illnesses. Colorado has 11 suspected cases. The state of Washington may have three cases, with one allegedly linked to a store. California’s second and third suspected deaths occurred in Tulare County and Kings County, where purchasing tested, legal cannabis from a store is banned in all areas other than the city of Woodlake. The victim’s family said he was using illicit market THC cartridges. California officials said Oct. 23 that just one of the 79 victims interviewed reported exclusive use of tested vapes. California lab Anresco announced Oct. 28 that no tocopheryl-acetate has been found in tests of over 200 licensed cartridges. Of Ohio’s 17 confirmed cases, 90% are black market THC cart-related, and none are medical cannabis system-related.

Why is this happening now?

  • Leafly has reported that a new ingredient—next-generation cutting agents (thickeners)—are being misused in THC vape carts. Legal chemical thickener makers said they do not approve of use in vape carts. Chemical thickener makers also do not approve of dilutions greater than 10%. However, their web sites are unclear about the products’ approved and unapproved uses. The chemical makers have no information on what inhaling thickener aerosol does to your lungs, especially if it is heated or burned.
An oil-laden immune cell extracted from a VAPI patient in Utah (left). On the right, a normal macrophage. (Courtesy Andrew Hansen, Jordan Valley Medical Center)

An oil-laden immune cell extracted from a VAPI patient in Utah (left). On the right, a normal macrophage. Doctors have found lipid-laden macrophages in some but not all patients. Biopsies of 17 patients found “foamy macrophages and pneumocyte vacuolization” in all 17 samples. (Courtesy Andrew Hansen, Jordan Valley Medical Center)

How can I protect myself?

  • Only buy tested, regulated adult-use and medical cannabis products in legal stores like California, Washington, Oregon, and Colorado. Licensed supply chains are much harder to contaminate. By contrast, street traffickers are filling carts with harmful chemicals, and they go straight into your lungs. Here’s how to spot an illicit market, or counterfeit THC vape cart.
  • Though licensed markets have more safeguards, suspicious additives are not yet banned in California, Washington, Oregon, and Colorado. Colorado intends to ban tocopheryl-acetate, MCT oil, and PEG this winter.  On Sept. 24, the California Dept. of Public Health asked all consumers to refrain from all vaping. On Sept. 23, Massachusetts paused all vape sales statewide. On Sept. 12, Oregon regulators told stores to post vape warnings and hold suspicious products, and told licensed cart markers to immediately admit any “undisclosed agents” or face “legal consequences.” Oregon retailers have begun pulling suspicious products. On Sept. 26, Oregon officials told consumers to stop vaping anything at this time. On Oct. 15, Oregon banned all non-cannabis-derived vape flavorings. On Sept. 27 Washington halted sales of e-cigarette flavorings. On Sept. 26, Colorado dispensary chain Medicine Man stated that it had “removed all vape products containing propylene glycol or vitamin E acetate from its shelves effective immediately.”
  • Cheap illicit market vape carts also routinely malfunction. Malfunctioning carts can get very hot, and burn additives and thickeners, releasing an unknown noxious gas. Run them at low, controlled temperatures.
  • If you’re concerned about additives in your cannabis, stick to tested flowers from licensed adult-use stores. Check store licenses on regulators’ websites, like California’s license lookup tool. In terms of extracts, additive-free extract is called “rosin”, and it also comes in vape carts in mature adult-use markets. There’s also tinctures, sublinguals, edibles, topicals, and transdermals, for those who want to avoid all cannabinoid inhalation products.

Leafly originally published this story Sept. 6. We updated it again Nov. 8 at 9:00 a.m. PST.


David Downs's Bio Image

David Downs

David Downs directs news and lifestyle coverage as the California Bureau Chief for He’s written for WIRED, Rolling Stone and Billboard, and is the former cannabis editor of the San Francisco Chronicle, as well as the author of several cannabis books including ‘Marijuana Harvest’ by Ed Rosenthal and David Downs. He co-hosts The Hash podcast. TW: @davidrdowns | IG @daviddowns