In this week's MMWR, a 2024 accidental intoxication of pizza with THC (a psychoactive substance found in Cannabis) which affected at least 85 persons. The investigation found that the pizza restaurant had run out of oil to make doughy, so they used oil from a shared kitchen located in the same building. Unfortunately one of users of the shared kitchen made edible products using hemp-derived Δ9-THC. "The owner initially thought the oil was plain canola oil but later realized it might have been infused with THC. Oil from a large, labeled storage container in the same area where the owner found the oil he used, tested positive for THC".
"Among 107 responses that were considered valid, 85 persons met the following case definition of THC intoxication: 1) ate pizza, garlic bread, cheese bread, or a grinder (submarine sandwich) purchased from the restaurant during October 22–24 and 2) reported at least one symptom of THC intoxication that began within 5 hours after eating the restaurant’s food, defined as dizziness, sleepiness, anxiety, short term memory impact or time distortion, increased heart rate, nausea, paranoia, panic attack, increased blood pressure, vomiting, or hallucinations."
For those involved in shared kitchens, this is a reminder of the importance of understanding what items are being made, and then ensuring proper labeling, cleanup, etc. There have been past issues associated with shared kitchens where there is cross contamination or allergen cross contact.
You wonder if there was a rush to buy the remaining contaminated pizza?
CDC MMWR
https://www.cdc.gov/mmwr/volumes/74/wr/mm7427a2.htm
Tetrahydrocannabinol Intoxication from Food at a Restaurant — Wisconsin, October 2024Weekly / July 24, 2025 / 74(27);439–442
Amanda Kita-Yarbro, MPH1; Stefanie Moccero1; Katie Brobston, MS1; Jacob Goebel1; Janice Block Banks1; Christy Vogt, MPH1; Casey Schumann, MS1; Katarina M. Grande, MPH1; Julia Olsen, MSEd1; Bonnie Armstrong, MPH1 (View author affiliations)Summary
What is already known about this topic?
Tetrahydrocannabinol (THC), a psychoactive substance found in Cannabis sativa plants, including varieties such as hemp, is increasingly being used in consumer products.
What is added by this report?
During October 22–24, 2024, at least 85 persons, ranging from age 1–91 years, ate food from a restaurant in Wisconsin and experienced symptoms consistent with THC intoxication. The restaurant was in a building with a cooperative (i.e., shared) kitchen used by a state-licensed vendor who produced edible THC products. The restaurant mistakenly used THC-infused oil from the cooperative kitchen to prepare dough.