July 20 (UPI) -- Smoking or swallowing synthetic marijuana products can lead to serious health consequences, including severe lung damage and death, a study published Monday by JAMA Network Open found. Eighteen of 30 patients admitted to two New York City hospitals after they used the drugs K2 and Spice, known as "fake weed," over a two-year period developed acute respiratory failure, while 21 required intubation, according to researchers at Mount Sinai Medical Center. Advertisement In addition, 10 of the patients were in a coma when they arrived at the hospital, and six suffered seizures, the researchers said.