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can you blackout from weed

Why Does a Single Hit of Weed Make Me Faint?

One night in 2005, at a party at my house, two things happened: I had a single toke from a joint, and a friend introduced me to her new boyfriend. For most people this confluence of events would be no problem, but my body was not having it. As my friend’s boyfriend dribbled on about his adventures in Peru, his fluffy hair began to morph and swirl. The more it swirled, the more I wanted to vomit. Then his voice started piping down through a tiny hole in the roof, then… nothing. It was lights out. That was the first time it happened, but soon enough it became apparent that this was my fate. I could not inhale marijuana—not even a little bit, not even sans alcohol—without blacking out. But why? Is my constitution so delicate, just a whiff of weed requires its total shut-down?

One of the only studies conducted on this phenomenon was published in 1992. Researchers from Duke University gave ten healthy men a strong joint to smoke while standing up, and reported that six participants felt “moderate” to “severe” dizziness. Those who experienced severe dizziness also showed marked decreases in blood pressure, which went as low as 60 mmHg.

The standing-up part is key because it indicates weed could bring on something called orthostatic hypertension, low pressure caused by the movement or position of the body.

“Marijuana can cause quite profound lowering of blood pressure, and cause users to faint as not enough blood gets to the brain,” confirms Dr. Andrew Mongomery, a general practitioner. “A lesser lowering of blood pressure may lead to a sense of dizziness without actually passing out, [although] the biological mechanisms underlying this are highly complex and incompletely understood.

“Marijuana can also lead to anxiety,” he adds, “with a secondary effect of dizziness—or act on the brain directly to create a sense of rotational dizziness.”

Blood vessels dilate, causing the brain to be deprived of oxygen and thus blacking out.

Dr. Harry McConnell, a Professor of neuropsychiatry at Griffith University’s Menzies Health Institute, says the reason behind a weed-related fainting spell depends on the situation and the individual. Aside from a possible drop in blood pressure, “it could also be seizures that cause blackouts, or the other chemicals mixed with it. After all, Marijuana is not pure, so it might have recreational chemicals mixed with it. People may not be aware of those ingredients.

“Marijuana might [also] cause vasodilation,” Dr. McConnell continues, “where blood vessels dilate, causing the brain to be deprived of oxygen and thus blacking out. Sometimes episodes of vertigo can also cause blackouts.”

Then there is the possible effect of other recreational substances, possible other drug interactions, personal medications, or medical conditions. A study from 2002 noted that while weed’s “cardiovascular effects” are not associated with serious health problems for most young, healthy users, people with cardiovascular disease could be putting their health at risk. This is “because of the consequences of the resulting increased cardiac work, increased catecholamine levels, carboxyhemoglobin, and postural hypotension.”

Whatever the reason behind your body’s hatred of the herb, accept that the weed life may not be for you, and get yourself seen to. “[Fainting from marijuana use] is not certainly uncommon,” confirms McConnell. “It’s recognized. But it’s always important to go to a doctor and get evaluated.”

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One toke and I'm out.

Anyone ever blackout or faint while being high? Or any of these similar issues?

ma jigga
Well-Known Member

2 years ago I was hanging out with some friends just chilling, smoking like we usually did without any problems.. On this day it changed. I got SO high that I felt my heart racing, lost my vision slowly kind of like when you get up too fast. I also heard a loud high pitched hum, lost control and fell right to the floor. I regained consciousness after a few seconds and got up with the help of a few shocked friends. But I still felt like complete crap. A few seconds later, my vision fades again and I faint again. According to my friends, I was out longer and I had a seizure-like jitter for a few seconds before I woke up again. Before this day, I never had problems with being high at all.. My friends got me water and I was back on my feet in an hour. Just really confused. I never went to get it checked. It’s not like I can go to a doctor and be like, “Hey, so I got really high and blacked out, what’s up with that!?”. Next day, I smoked up with them again and we talked about it and joked around about how they thought I was dead. Nbd. No problems with being high. A few months later at a party, another incident involving losing my vision and hearing a high pitched hum. Same feeling I would get before fainting, only this time, I managed to stay on my feet. Except this time, I puked before I felt like myself again. At a rooftop party with BABES. FUCK. Moving on.

Keep note. This NEVER happens when I don’t smoke. Only when I get high with people. When I smoke alone, I seem to be fine considering I’m more chilled out about the fact that nobody has to see me get sick or freak out about me.

Now 2 years later, I can’t manage to get the same high I had before the incident. Every time I smoke with friends, and smoke a considerable amount which is average to them and what USED to be my average, I start getting that feeling before I’m about to faint. I get speechless, pale, my heart thumps and I sweat. There’s a light shooting pain in my chest but it doesn’t bother me much. And sometimes, I forget I’m breathing and get dizzy. It’s not enough to make me pass out but I found some sort of control over it. It’s just, I can’t have a comfortable high anymore and it’s pissing me off.

Sorry for typing out too much but can anyone relate to this or help with some advice? No one I talk to around here knows and I can’t find much on it through google.

2 years ago I was hanging out with some friends just chilling, smoking like we usually did without any problems.. On this day it changed. I got SO high that…