A stop smoking drug with potentially psychotic side effects, Chantix has been the subject of an ongoing News 8 investigation for months.

There are new reports that the Veterans Administration never warned veterans, used in a clinical trial, of the potential dangers.

In fact, the VA was alerted in September by Channel 8 as part of our investigation.

Former US Army sniper James Elliott says he feels betrayed by the Veterans Administration.

"Rat, lab rat, guinea pig, disposable hero," is how he describes himself.

Elliott was among some 140 combat veterans in a government clinical trial combining post traumatic stress disorder therapy with the stop smoking medication Chantix.

Only, the mentally-stressed patients weren't told about possible psychotic, even suicidal side-effects of the drug, until three months after the FDA issued an alert in November.

By then, Elliot had suffered a violent mental breakdown. His fiance even called 911, scared for her safety. After hearing the report Tuesday, Barack Obama demanded an investigation, saying "it is outrageous and unacceptable that our government would irresponsibly endanger veterans."

It turns out, the VA had been alerted to potentially dangerous side-effects even before the FDA alert by News 8, in our first investigative report on Chantix, September 4, some two months before the FDA warning.

The Dallas VA is not involved in the Chantix clinical trial.

But Dr. Adinoff told us our concern about violent side effects could be significant, if more complaints followed.

"It's something you'd want the company to know about, you'd want the FDA to know about," he said.

Similar reports poured into the FDA by the thousands.

By phone, Dr. Adinoff told us he did not pass along these early concerns to anyone else at the VA.

The Veterans Administration released a statement reasserting "that neither the FDA nor the manufacturer has ever recalled Chantix." And that "the VA's use of Chantix is consistent with guidelines for smoking cessation established by the US Surgeon General's office."

On Wednesday, the head of the Veteran's Affairs Committee called for government clinical trials using Chantix to be suspended, calling them "appalling."