.. h and phlegm, symptoms of chronic bronchitis, and more frequent chest colds. Continuing to smoke marijuana can lead to abnormal functioning of the lungs and airways. Scientists have found signs of lung tissue injured or destroyed by marijuana smoke. Well I am still in a search to find a site, which says is not quite as partial to either side. The government wants to make it sound very bad. The other sites all want to make sound like it not very bad so it becomes legalized.
There is not one site I have as have yet that is not partial so I will keep adding highlights of all of the different sites. The only thing that all the sites say that smoking and driving are very bad combinations. NIDA says in a another report, Driving and marijuana do not mix; that’s the bottom line, said Dr. Stephen J. Heishman, a research psychologist in the Clinical Pharmacology Branch of NIDA’s Division of Intramural Research. Figures from previous studies of automobile accident victims show that from 6 to 12 percent of nonfatally injured drivers and 4 to 16 percent of fatally injured drivers had tetrahydrocannabinol (THC), the psychoactive ingredient in marijuana, in their bloodstream, Dr.
Heishman said. One study showed that 32 percent of drivers in a shock trauma unit in Baltimore had marijuana in their bloodstream, he noted. However, in most of these studies, the majority of subjects who tested positive for THC also tested positive for alcohol, making it difficult to single out THC’s effect on driving. In a laboratory study at NIDA’s Addiction Research Center in Baltimore that controlled for alcohol’s confounding effect, Dr. Heishman tested marijuana’s effects on the functional components of driving.
Study subjects smoked a marijuana cigarette, waited 10 minutes, then smoked another cigarette. Both cigarettes contained either 0, 1.8, or 3.6 percent THC. Twenty minutes after smoking the cigarettes, the subjects were given a standard sobriety test similar to a roadside sobriety test. The test showed that marijuana significantly impaired their ability to stand on one leg for 30 seconds or touch their finger to their nose. As the dose of THC increased, the subjects swayed more, raised their arms, and had to put their feet down in an attempt to maintain their balance.
Subjects also committed 2.5 times more errors when they attempted to touch their nose with their finger. The data from these laboratory studies show that marijuana impairs balance and coordination – functional components important to driving – in a dose-related way, said Dr. Heishman. These effects may be related to reported marijuana-induced impairment of automobile driving, he stated. Highway and urban driving studies conducted in the Netherlands show less impact on actual driving.
However, these driving studies used very low doses of marijuana for safety reasons, Dr. Heishman said. Future research using appropriate safety measures should test the effect of higher doses of marijuana on driving as well as the combined effect of marijuana and alcohol on driving, he concluded. In another study, Dr. Wayne Lehman of Texas Christian University looked at how marijuana affects job performance.
A series of surveys he conducted among 4,600 municipal employees in four cities in the Southwest indicated that 8 percent of employees had smoked marijuana in the past year, and a large percentage of these users had smoked marijuana in the past month, Dr. Lehman said. Employees who report marijuana use are different from nonusers, said Dr. Lehman. They are much more likely than nonusers to have arrest histories, low self-esteem, high rates of depression, and friends who are deviant. Many marijuana smokers also have alcohol-related problems.
One-third of marijuana users in the surveys reported they drank frequently, one-half said they got drunk, and 60 percent reported a problem with alcohol use, according to Dr. Lehman. This behavioral pattern in the personal backgrounds of marijuana-smoking employees was associated with negative attitudes toward work and job performance, Dr. Lehman said. The surveys found that marijuana users were less likely than nonusers to commit to the organization, had less faith in management, and experienced low job satisfaction. These workers reported more absenteeism, tardiness, accidents, workers’ compensation claims, and job turnover than workers who had not used marijuana.
They were also more likely to report to work with a hangover, miss work because of a hangover, and be drunk or use drugs at work. These data indicate that marijuana use is strongly associated with problematic alcohol use and a pattern of general deviance that leads to impaired behaviors and poor workplace performance, Dr. Lehman concluded. It goes on to say, Regular heavy marijuana use compromises the ability to learn and remember information primarily by impairing the ability to focus, sustain, and shift attention, says Dr. Harrison Pope, Jr., of McLean Hospital in Belmont, Massachusetts, who directed the recent study. Noting that the actual ability to recall information remains relatively unaffected, Dr. Pope says, If you could get heavy users to learn an item, then they could remember it; the problem was getting them to learn it in the first place. In the study conducted among college students, Dr. Pope and Dr. Deborah Yurgelun-Todd, also of McLean Hospital, tested the cognitive functioning of 65 heavy cannabis users, most of whom had smoked marijuana at least 27 out of the previous 30 days. The researchers compared the heavy users’ cognitive functioning to that of a comparison group of 64 light users, most of whom had smoked marijuana on no more than 3 of the previous 30 days.
Heavy users ranged in age from 18 to 24 years and light users from 18 to 28 years. The two groups were similar demographically and had comparable numbers of men and women. Subjects in both groups had smoked marijuana for at least 2 years, and none had smoked regularly for more than a decade. To ensure that the subjects did not smoke marijuana or use other illicit drugs or alcohol during the study, researchers monitored them for 19 to 24 hours. Then the subjects performed a battery of standard tests designed to assess their ability to pay attention, learn, and recall new information.
The tests indicated that heavy marijuana users had more difficulty than light users in sustain-ing and shifting attention and hence in registering, organizing, and using information. Heavy users exhibited these cognitive deficits by being less able than light users were to learn word lists; by making a greater number of errors in sorting cards by different characteristics, such as by color or shape; and by making more errors when the rules for sorting the cards were changed without warning. Men in the heavy users group showed somewhat greater impairment than women in the same group. While the residual cognitive impairments detected in the study were not severe, they could be significant in the day-to-day life of chronic users, Dr. Pope says.
The diminished ability to pay attention and decreased mental flexibility exhibited in these tests may cause chronic marijuana users important difficulties in adapting to intellectual and interpersonal tasks, he says. Well I dont know which ones to believe. They all have done lots of research as well as I. I think that most likely NIDA is right because it is run by the government. The government may be trying to make it sound worse then it is though. No matter what though marijuana is a very harmful drugs.
It should not be used by anyone. Science.