The American Heart Association has some bad news for weed smokers. The association has released a new statement based on studies claiming that marijuana is not good for the heart. “The American Heart Association recommends that people do not smoke substances, vape, including cannabis products, because of the potential damage to the heart, lungs and blood vessels,” said Dr. Rose Marie Robertson, the deputy chief scientist and medical officer for the American Heart Association, in a statement. The warning is already obvious, most people know that inhaling smoke is not the best thing for your heart and lungs. Therefore you cough, your body fights to remove the smoke because it is harmful.

The new scientific statement, published Wednesday, used existing information and studies to draw conclusions about weeds and the heart. The statement says that marijuana has “the potential to interfere with prescription medications” as well as “cardiovascular conditions such as events such as heart attacks and strokes,” according to clinical pharmacologist Robert Page II. Page, however, did not discourage the use of marijuana at all.

“If people choose to use cannabis for its medicinal as well as recreational effects, the oral and topical forms for which doses can be measured may reduce some of the potential harm,” Page said in a statement. For those living in states where marijuana is legal, Page encourages them to stay away from drug dealers. “It is also vital that people use only legal cannabis products because there are no controls on the quality or content of cannabis products sold on the street,” he said.