An investigation into Hillary Clinton’s prescribed treatment for her reported case of pneumonia is raising new concerns about her treatment — and the long-term impact it may have on her.

RTV 6 reports Clinton was prescribed the powerful antibiotic Levaquin to treat her lung illness.

The news station reports:

Levaquin is the brand name for levofloxacin, which is part of a class of drugs called fluoroquinolones, intended to treat major infections like pneumonia, anthrax exposure, plague and urinary tract infections.

Call 6 Investigates has been looking into potential safety issues with the drug, including devastating side effects like tendon rupture, nerve damage and psychiatric problems.

In July, the FDA issued a “black box” warning for Levaquin, the most serious such warning, because of its potentially serious side effects.

“The warnings advise patients that the serious side effects generally outweigh the benefits for patients with sinus infections, chronic bronchitis, and urinary tract infections, and fluoroquinolones should be used as a last resort,” RTV 6 reports.

At least three doctors are publicly airing concerns about the Levaquin prescription.

“It could be a serious drug reaction,” Dr. Charles Bennett tells the news station. “The best thing to do is stop the drug, I would suggest, if it’s a potential serious adverse drug reaction. You can use many other antibiotics for pneumonia. I would defer to her physicians there.”

Bennett believes the drug is putting Clinton’s life at stake.

“Our data estimates the FDA receives several thousand reports per year of this toxicity, and several thousand deaths,” he says. “This is equivalent to a 747 plane going down once a month.”

Dr. Judy Stone called the treatment “not good antibiotic stewardship.”

The choice of Levaquin for Hillary’s pneumonia is not good #antibiotic stewardship x PCN all, @CIDRAP_ASP My post: https://t.co/prKDveCZp0 — Judy Stone (@DrJudyStone) September 15, 2016

Stone, who attempts to downplay questions are Clinton’s health status in her piece for Forbes, nonetheless objected to the Levaquin prescription:

The choice of antibiotics troubles me. A mild, community-acquired pneumonia could be treated with an amoxicillin-type drug and a macrolide (azithromycin or clarithromycin) or doxycycline. These drugs are much safer than Levaquin, a quinolone type of antibiotic.

Why was Levaquin prescribed? I can obviously only guess, but it is commonly overprescribed because of irresponsible marketing, clinical guidelines that do not discourage its use and harried physicians who use it as a shortcut, thinking it will “cover everything.” In this case, perhaps they wanted to bring out “the big guns” as a just in case.

Dr. Ronald Hoffman alerted his followers to his concerns.

Hillary Clinton is taking Levaquin–will she be #floxed? https://t.co/h0n4DWBTzp — Dr. Ronald Hoffman (@DrRonaldHoffman) September 14, 2016

“Will she be floxed?” he asked, referring to the potentially nasty side effects related to the drug.

He shared a 2014 article from People’s Pharmacy, which reads in part:

Americans love antibiotics. We tend to think of them as magic bullets, protecting us from life-threatening infections with almost no downside. But one kind of antibiotic called fluoroquinolones (FQ, quinolones or quins for short) has left many patients permanently impaired. Although most people can take such medications safety, others are left devastated.

A group called “Fluoroquinolone Toxicity 24/7 Forum” describes it this way:

“Fluoroquinolone toxicity has been like an atomic bomb exploding in their bodies damaging their muscles and scrambling their DNA to the point many are too sick to work, too weak to walk.”

The article shared testimonies of several patients who had their minds bent by the drug.

“I too suffered a violent reaction to this drug. I took it for two days and became very nauseated. By the third day I not only felt listless, nervous and sick, but when I went to bed I couldn’t sleep and began having violent multi-colored hallucinations.

“After two nights of almost no sleep, accompanied by hallucinations, I asked my physician for something else. At first she was reluctant, but when she understood there was no way I’d take any more Floxin, she gave me a different prescription. I think Floxin is a frightening drug and I hope you will warn your readers that the side effects of Floxin may be more common than previously thought.”

Perhaps Dr. Drew, who lost his HLN show over questioning Hillary Clinton’s health care, was onto something.