Just some information about  MARIJUANA, !!
"Health Effects"!!

Marijuana abuse is associated with many detrimental health effects. These effects can include frequent respiratory infections, impaired memory and learning, increased heart rate, anxiety, panic attacks and tolerance. Marijuana meets the criteria for an addictive drug and animal studies suggest marijuana causes physical dependence and some people report withdrawal symptoms.11

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 illnesses, a heightened risk of lung infections, and a greater tendency toward obstructed airways. Cancer of the respiratory tract and lungs may also be promoted by marijuana smoke. Marijuana has the potential to promote cancer of the lungs and other parts of the respiratory tract because marijuana smoke contains 50 percent to 70 percent more carcinogenic hydrocarbons than does tobacco smoke.12

Marijuana's damage to short-term memory seems to occur because THC alters the way in which information is processed by the hippocampus, a brain area responsible for memory formation. In one study, researchers compared marijuana smoking and nonsmoking 12th-graders' scores on standardized tests of verbal and mathematical skills. Although all of the students had scored equally well in 4th grade, those who were heavy marijuana smokers, i.e., those who used marijuana seven or more times per week, scored significantly lower in 12th grade than nonsmokers. Another study of 129 college students found that among heavy users of marijuana critical skills related to attention, memory, and learning were significantly impaired, even after they had not used the drug for at least 24 hours.13

Of an estimated 106 million emergency department (ED) visits in the U.S. during 2004, the Drug Abuse Warning Network (DAWN) estimates that 1,997,993 were drug-related. DAWN data indicate that marijuana was involved in 215,665 ED visits.14

DAWN also collects information on deaths involving drug abuse that were identified and submitted by 128 death investigation jurisdictions in 42 metropolitan areas across the United States. Cannabis ranked among the 10 most common drugs in 16 cities, including Detroit (74 deaths), Dallas (65), and Kansas City (63). Marijuana is very often reported in combination with other substances; in metropolitan areas that reported any marijuana in drug abuse deaths, an average of 79 percent of those deaths involved marijuana and at least one other substance.

More young people are now in treatment for
marijuana dependency than for alcohol or
for all other illegal drugs combined.

Department of Health and Human Services,
Substance Abuse and Mental Health Services Administration,
Treatment Episode Data Set, 2000