What kinds of mental illnesses can occur from excessive marijuana use?

The person in question has been smoking pot every day since he was 12 years old . Sometimes in excess of three blunts (cigar size) every day. He is now 27. He is cycling through depressive and manic states, where he overreacts and becomes very abusive to his family.

Answer:
I absolutely DO NOT agree with Spooky's statement!!
It is not true that the symptoms will get worse even if he gives up. But he does have to give up now. Yes there has been damage caused from smoking but the brain produces millions of new brain cells each and every day that will combat the previous loss of brain cells. That's one of the fantastic things about the human body and brain - it will heal itself. I know from personal experience that it can lead to extreme depression and paranoia. In some cases it can even lead to schizophrenia. I smoked roughly 10-12 bongs every day from the age of 13 and gave up when I was 21 because of the depression and paranoia. I went 'cold turkey'. It was hard at the start but after about 3-7 days I was fine. It's one of those things though that if you don't want to give it up, then you won't. You have to want to do it. And believe me, life is SO much better now than what it ever was when I was smoking..
Four years on and I now manage a Public Relations company and no longer suffer depression or paranoia. I take Bee Pollen and Ecinacae capsules everyday and recommend them. They boost the immune system.
marijuana contains compounds that actualy rot the brain and cause phisical holes in the brain, unfortunately there is no cure or known medical relief, his symptoms will only get worse even if he gives ups as the rot has already taken hold, all you can do is make him feel happy and comfortable until the inevitable happens.
it makes you stupid.


MOON ...spells marijuana.
There is a very nice self-titering aspect to cannabis. Each puff is a very small dose; the time lag between inhaling a puff and sensing its effect is small; and there is no desire for more after the high is there. I think the ratio, R, of the time to sense the dose taken to the time required to take an excessive dose is an important quantity. R is very large for LSD (which I've never taken) and reasonably short for cannabis. Small values of R should be one measure of the safety of psychedelic drugs. When cannabis is legalized, I hope to see this ratio as one of he parameters printed on the pack. I hope that time isn't too distant; the illegality of cannabis is outrageous, an impediment to full utilization of a drug which helps produce the serenity and insight, sensitivity and fellowship so desperately needed in this increasingly mad and dangerous world.

Just as most experts agree that occasional or moderate use of marijuana is innocuous, they also agree that excessive use can be harmful. Research shows that the two major risks of excessive marijuana use are: (1) respiratory disease due to smoking and (2) accidental injuries due to impairment. In addition, marijuana speeds the heartbeat, which can be dangerous for patients with serious heart disease.
I can not help you now, but give an advice to all you!
Pls do not use it, only one time !
I think you need to get him some serious help!! He could become brain dead.
Effects of Marijuana on the Brain :
Scientists have learned a great deal about how THC acts in the brain to produce its many effects. When someone smokes marijuana, THC rapidly passes from the lungs into the bloodstream, which carries the chemical to organs throughout the body, including the brain.

In the brain, THC connects to specific sites called cannabinoid receptors on nerve cells and influences the activity of those cells. Some brain areas have many cannabinoid receptors; others have few or none. Many cannabinoid receptors are found in the parts of the brain that influence pleasure, memory, thought, concentration, sensory and time perception, and coordinated movement(3).

The short-term effects of marijuana can include problems with memory and learning; distorted perception; difficulty in thinking and problem solving; loss of coordination; and increased heart rate. Research findings for long-term marijuana abuse indicate some changes in the brain similar to those seen after long-term abuse of other major drugs. For example, cannabinoid (THC or synthetic forms of THC) withdrawal in chronically exposed animals leads to an increase in the activation of the stress-response system(4) and changes in the activity of nerve cells containing dopamine. Dopamine neurons are involved in the regulation of motivation and reward, and are directly or indirectly affected by all drugs of abuse.

Effects on the Heart
One study has indicated that an abuser's risk of heart attack more than quadruples in the first hour after smoking marijuana. The researchers suggest that such an effect might occur from marijuana's effects on blood pressure and heart rate and reduced oxygen-carrying capacity of blood.

Effects on the Lungs
A study of 450 individuals found that people who smoke marijuana frequently but do not smoke tobacco have more health problems and miss more days of work than nonsmokers. Many of the extra sick days among the marijuana smokers in the study were for respiratory illnesses.

Even infrequent abuse can cause burning and stinging of the mouth and throat, often accompanied by a heavy cough. Someone who smokes marijuana regularly may have many of the same respiratory problems that tobacco smokers do, such as daily cough and phlegm production, more frequent acute chest illness, a heightened risk of lung infections, and a greater tendency to obstructed airways. Smoking marijuana possibly increases the likelihood of developing cancer of the head or neck. A study comparing 173 cancer patients and 176 healthy individuals produced evidence that marijuana smoking doubled or tripled the risk of these cancers.

Marijuana abuse also has the potential to promote cancer of the lungs and other parts of the respiratory tract because it contains irritants and carcinogens. In fact, marijuana smoke contains 50 to 70 percent more carcinogenic hydrocarbons than does tobacco smoke. It also induces high levels of an enzyme that converts certain hydrocarbons into their carcinogenic form--levels that may accelerate the changes that ultimately produce malignant cells. Marijuana users usually inhale more deeply and hold their breath longer than tobacco smokers do, which increases the lungs' exposure to carcinogenic smoke. These facts suggest that, puff for puff, smoking marijuana may be more harmful to the lungs than smoking tobacco.

Other Health Effects
Some of marijuana's adverse health effects may occur because THC impairs the immune system's ability to fight disease. In laboratory experiments that exposed animal and human cells to THC or other marijuana ingredients, the normal disease-preventing reactions of many of the key types of immune cells were inhibited. In other studies, mice exposed to THC or related substances were more likely than unexposed mice to develop bacterial infections and tumors.


Effects of Heavy Marijuana Use on Learning and Social Behavior
Research clearly demonstrates that marijuana has the potential to cause problems in daily life or make a person's existing problems worse. Depression, anxiety, and personality disturbances have been associated with chronic marijuana use. Because marijuana compromises the ability to learn and remember information, the more a person uses marijuana the more he or she is likely to fall behind in accumulating intellectual, job, or social skills. Moreover, research has shown that marijuana's adverse impact on memory and learning can last for days or weeks after the acute effects of the drug wear off.

Students who smoke marijuana get lower grades and are less likely to graduate from high school, compared with their nonsmoking peers. A study of 129 college students found that, among those who smoked the drug at least 27 of the 30 days prior to being surveyed, critical skills related to attention, memory, and learning were significantly impaired, even after the students had not taken the drug for at least 24 hours. These "heavy" marijuana abusers had more trouble sustaining and shifting their attention and in registering, organizing, and using information than did the study participants who had abused marijuana no more than 3 of the previous 30 days. As a result, someone who smokes marijuana every day may be functioning at a reduced intellectual level all of the time.

More recently, the same researchers showed that the ability of a group of long-term heavy marijuana abusers to recall words from a list remained impaired for a week after quitting, but returned to normal within 4 weeks. Thus, some cognitive abilities may be restored in individuals who quit smoking marijuana, even after long-term heavy use.

Workers who smoke marijuana are more likely than their coworkers to have problems on the job. Several studies associate workers' marijuana smoking with increased absences, tardiness, accidents, workers' compensation claims, and job turnover. A study among postal workers found that employees who tested positive for marijuana on a pre-employment urine drug test had 55 percent more industrial accidents, 85 percent more injuries, and a 75-percent increase in absenteeism compared with those who tested negative for marijuana use. In another study, heavy marijuana abusers reported that the drug impaired several important measures of life achievement including cognitive abilities, career status, social life, and physical and mental health.
Paranoia is the only thing I have heard.He may just be Bi Polar on the side?
There is basically nothing harmful with smoking grass, if like everything else, it is done in moderation. It certainly is much safer for you than drinking a lot of alchol, so be glad that he's not addicted to that. I've had doctor's recommend the use of grass for me for both pain relief and for insommnia and it certianly works, and these are not quacks, but are actually 3 top doctors in their fields, I don't think they would be recommending something that was going to hurt me.
It may be all the grass that is causing the depression and the manic states, but on the other hand, it could just as easily be something else that is more serious going on in his brain. As grass is not addictive, he is not needing to smoke it, just wanting to smoke it, and not needing more and more to get high. I suggest that it really is a time to see a shrink, as he has to deal with the depression and find out if it is the drugs, in which case, taper off, or if it's something else, like a true depression, deal with it and find the cause.
Excessive marijuana use causes brain damage, psychotic behavior, depression and concentration problems.
dude give the dude some pot. its better than him beating his family because he would be mello. theres no mental illness from pot-aka marijuana. probably addiction, and thats all.
spooky doesnt no wat he is talking about he is right but marijuana doesnt do that ecstacy does wat a retard well anywayz thats all i no on this q cuz nothing is proven wen it comes to marijuana

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