28 May 2013 --- Wang, a fellow at the Rocky Mountain Poison & Drug Center, said today's marijuana can be much stronger, and these products can contain higher concentrations of THC, the active ingredient in the drug. Some marijuana infused candy bars, for example, contain 300 milligrams of THC. Children who ingested the drug exhibited symptoms that included respiratory problems, extreme sleepiness, difficulty in walking and lethargy. Many underwent a battery of expensive tests to diagnose their problem because the history of exposure was not given, or medical professionals were not familiar with marijuana causing these symptoms.
