Both articles also make misleading claims of marijuana's potential harms. For example, the March 13 letter asserts that the FDA has attributed four deaths to THC. This is spurious. While the natural THC found in marijuana has never caused an overdose death, the synthetic version of THC found in the FDA-approved drug Marinol has caused four deaths. Regarding the potential for a marijuana-related overdose, a 1988 ruling by the DEA's own administrative law judge found that a marijuana smoker "would have to consume 20,000 to 40,000 times as much marijuana as is contained in one marijuana cigarette. ... A smoker would theoretically have to consume nearly 1,500 pounds of marijuana within about fifteen minutes to induce a lethal response."