Polycyclic aromatic hydrocarbons and cannabinoids in secondhand cannabis smoke ScienceDirect Single vaping episode of cannabis could yield positive results in urine drug tests Did you know? Some vape products have been tied to seizures and even found laced with fentanyl. One puff from a contaminated cartridge can be deadly. Keep yourself and our Second hand marijuana smoke could make you fail a workplace drug test Calgary Herald Tobacco free workplaces help protect health and support safer environments for everyone. By reducing secondhand smoke, encouraging cessation, and promoting cleaner workplaces, employers can improve overall employee well being, while also reducing costs and Vaping Produces Far Less Second Hand Nicotine Than Smoking Respiratory Therapy