MADISON (WKOW) — Public Health Madison & Dane County (PHMDC) is urging the public to stop vaping after a series of hospitalizations they say are related to e-cigarette use.

“I urge everyone that currently uses vaping devices to inhale THC or nicotine to stop immediately, and encourage others to not begin using these products,” Janel Heinrich, PHMDC’s health officer said in a statement. “Parents and educators can also help by talking with youth, since no amount of marijuana or nicotine use during adolescence is ever safe.”

PHMDC said there have been 34 cases of Wisconsinites hospitalized for severe lung disease and damage from vaping. There have also been over 200 such cases nation-wide, according to PHMDC.

In most cases, people reported using e-cigarettes or other vaping devices to inhale THC, the active ingredient in marijuana. THC is often mixed with other unknown, unregulated and unsafe chemicals and additives, according to PHMDC. Unregulated nicotine products can also be dangerous.

Officials encouraged anyone who has used vaping products and is experiencing unexplained shortness of breath, chest pain, cough, nausea, vomiting, fever, and weight loss to talk to a health care provider.