What do most of the mass shooters have in common since the recent rise in public shootings? Most, if not all, of them were on some kinds of prescribed psychiatric medication.

The world has been shaken to the core by the mass shooting by 19 year old Nikolas Cruz at Marjory Stoneman Douglas High School in Parkland, Floride. According to the Sun Sentinel, Nikolas Cruz was being treated for multiple psychiatric disorders and was on medication.

The Sun Sentinel said about Cruz’s psychiatric history:

His mother, Lynda Cruz, told investigators that her son had been diagnosed with autism and attention deficit hyperactivity disorder. He was being treated for depression, had a behavioral disorder and had been taking medication for the ADHD, the report said. Investigators wrote that they did not know whether he was still taking the medication.

Nikolas Cruz isn’t the only mass shooter that had been prescribed medication or had medication in their system when they committed those heinous acts. Sadly, one thing all school shooters seem to have in common is that they are diagnosed with psychiatric disorders and are given psychiatric medications to treat it.

CBS reports that Adam Lanza, the Sandy Hook Elementary School shooter, had been prescribed with medication that led to more problems:

Documents released by police in December 2013 included descriptions of sporadic treatment for his mental health troubles. At one point, experts at the Yale Child Studies Center prescribed antidepressant/anti-anxiety medication, but his mother discontinued the treatment after her son was unable to raise his arm after taking the medicine and never scheduled follow-up visits, police reports said.

This isn’t new, as CNN reported in 1999 about the Columbine shooter Eric Harris’ relationship with anti-depressants:

Reports surfaced Wednesday that one of the gunmen in the Littleton, Colorado, school shooting, Eric Harris, was rejected by Marine Corps recruiters’ days before the Columbine High School massacre because he was under a doctor’s care and had been prescribed an anti-depressant medication. Harris’ prescription was for Luvox, an anti-depressant medication commonly used to treat patients with obsessive-compulsive disorder.

Mass shooters of every age have been found to have some kind of traces from psychiatric medication in their blood. And this isn’t just for school shooters. CNN reports that an autopsy on the Las Vegas shooter, Stephen Paddock, showed that he was on anti-anxiety medications when he massacred 58 innocent people and injured over 850 other people.

Reuters has previously reported that Pulse Nightclub shooter Omar Mateen would stay up all night researching psychiatric medication. One acquaintance told Reuters that Mateen was ‘obsessed’ with looking up medication online and the obsession only intensified weeks prior to the shooting.

Fort Hood gunman Ivan Lopez was on a ‘cocktail of prescription drugs’ according to The Telegraph. The article explains that the soldier had been prescribed anti-depressants in addition to the sleeping medication Ambien.

According to a report by the CNN, James Holmes who was responsible for the Aurora, Colorado movie theater shooting was also on multiple medications including Clonazepam and Sertraline.BBC spoke with Professor David Healy about the Aurora movie theater shootings, and he believes the connection between the medication and mass killings is no coincidence…

These killings would never have happened had it not been for the medication James Holmes had been prescribed.”

Professor Peter Tyrer told the BBC that the medications James Holmes was prescribed could have exacerbated his condition: “His symptoms were exactly right for giving sertraline… but with his underlying personality, with that sort of person… some of the underlying predispositions can come out more strongly, and in the case of Holmes these were very dangerous indeed.”

The List Goes Even Further

Myron May, who had a shooting spree at Florida State University’s Strozier Library in 2015 was reportedly on a combination of Vyvanse and Wellbutrin.University of Texas student Kendrex J. White was reportedly on Zoloft when he was on a stabbing spree on campus that killed a person and injured three last year.

12 year old Juse Reyes who went to a shooting spree in his middle school was prescribed a generic form of Prozac by his local psychotherapist before taking a 9 mm handgun to school using it to kill his teacher and wound two other people before taking his own life.

Aaron Ybarra went on a rampage with a shotgun at Seattle Pacific University in 2014 and was ‘on a lot of medication’ such as Prozac and Risperdal. Ybarra claimed that he could hear the voice of Eric Harris, the Columbine shooter with similar prescribed medications.

While the vast majority, if not all, of the recent mass shooters have taken these medications, the medical community claims that there is no scientific evidence to connect their drugs with the homicidal behavior of people. Doctors and pharmaceutical companies continue to claim that the medications are safe to use.

However, many people are questioning the recent spike in deadly shootings by mentally handicapped and ill people and the increase of prescribing of psychiatric drugs.