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Replying to Blastcat]
Medicine is not an exact science simply because it is difficult to get a firm hand on controlling all the variables so that you can do nice, neat, tidy studies. That's why doctors have changed their minds and will continue to do so and why the literature is full of often conflicting studies. I already mentioned about the big turnaround on pot. Now, some doctors are seeing nicotine as of great medical benefit in curing various neurological disorders from Parkinson's Disease to Schizophrenia. One study found that smokers were far less prone to developing Parkinson's Disease than nonsmokers. Check out sometime Discovery Magazine, March 2014 article titled "Nicotine: The New Wonder Drug?' Incidentally, alcohol, good old booze, is now recognized to help less risk of various diseases and heart problems. I recently had some female clients in rehab who were in fact advised by their doctors to drink wine during their pregnancy.
Our whole cultural philosophy of drugs is messy because it is very conflicted and often very arbitrary. On one hand, you have your strict Puritanical ethics. On the other, much of American culture sanctifies heavy indulgence. Work hard and get as high as you can. Prohibition, yet live it up in the speaks. It's also messy because it can be very arbitrary. Certain drugs are ruled as dangerous, made illegal. Many of the legal, prescribed drugs also have very dangerous side effects. I'm sure you have seen the TV commercials warning about various drugs out there. Heroin is illegal, but Methadone, which is just as dangerous and addictive, is legal. Pot o still listed as a Class I drug by the feds, even though it has no withdrawal symptoms. Xanax is prescribed, yet carries very dangerous withdrawal effects, including seizure and death. Cocaine was once highly recommended by doctors, yet now is illegal, though still used medically. Morphine is highly addictive, but still widely used, as it is one f the most effective pain killers. Most of the addicts from WW 2 were physician-engendered addicts. Many today are addicted to prescription medications. That's what killed Presley. So, yes, I have good reason to think our philosophy is a mess.