/Southern Nevada Health District disease investigation update

Southern Nevada Health District disease investigation update

February 25, 2022

LAS VEGAS — The Southern Nevada Health District continues to work with its partners to investigate a potential association between THC toxicity and the consumption of food or drink from Secret of Siam Thai Cuisine restaurant located at 5705 Centennial Center Blvd, Las Vegas, NV 89149.

As of February 24, 2022, several dozen patrons have reported they consumed items from the restaurant between January 28, 2022, and February 14, 2022, and experienced symptoms. Initial signs and symptoms included hallucinations, blurry vision, increased heart rate, disorientation or confusion, dizziness, loss of consciousness, dry mouth, and numbness or tingling in extremities. Some patrons who reported they did not intentionally consume or use marijuana in the previous 30 days tested positive for THC on a laboratory toxicological screen. All patrons have recovered. Additional reports of similar symptoms in additional patrons are under investigation.

The restaurant is closed while the investigation continues and food testing is being conducted to identify the source of contamination. The Health District has created a self-reporting survey on its website to identify additional patrons and gather information about which food or drink items could be possible sources. The Health District is encouraging all patrons who dined at the restaurant during January 24-February 14, 2022 – whether they experienced symptoms or not – to complete the survey. The survey is available at www.snhd.info/siamsurvey.

People may also contact the Health District at (702) 759-1300 if they have any questions or need assistance with the survey.


The Southern Nevada Health District serves as the local public health authority for Clark County, Boulder City, Henderson, Las Vegas, Mesquite and North Las Vegas. The agency safeguards the public health of the community’s residents and visitors through innovative programs, regulations, and initiatives focused on protecting and promoting their health and well-being. More information about the Health District, its programs, services, and the regulatory oversight it provides is available at www.SNHD.info.

Skip to content