More drug addict definitely fall victim of life sentence diseases or probably trauma which could affect their sociology performance. Drugs are chemicals. Different drugs, because of their chemical structures, can affect the body in different ways. In fact, some drugs can even change a person's body and brain in ways that last long after the person has stopped taking drugs, maybe even permanently.
Depending on the drug, it can enter the human body in a number of ways, including injection, inhalation, and ingestion. The method of how it enters the body impacts on how the drug affects the person. For example: injection takes the drug directly into the blood stream, providing more immediate effects; while ingestion requires the drug to pass through the digestive system, delaying the effects.
Most abused drugs directly or indirectly target the brain's reward system by flooding the circuit with dopamine. Dopamine is a neurotransmitter present in regions of the brain that regulate movement, emotion, cognition, motivation, and feelings of pleasure. When drugs enter the brain, they can actually change how the brain performs its jobs. These changes are what lead to compulsive drug use, the hallmark of addiction.
Yes, drugs are more harmful than people think. People have been conditioned to trust doctors at their word, which we should be able to, without question. With the growth of the pharmaceuticals industry has come an epidemic of health professionals pushing the newest drug being pushed to them by Big Pharma sales reps. A lot of these new prescription drugs are synthesized versions of 70s and 80s street drugs, with the same side effects if abused. So whether you're getting your stuff from the pusher man on the street or on the office, it's all dangerous if abused.
The long-term use of many so-called recreational drugs has side effects that we are only now beginning to notice. The human brain can cope with a great deal of abuse but drugs that are not designed to be ingested repeatedly can impair memory, lead to psychosis and other mental health problems.
Wells, that depends on how much each of us think we know about drugs- I know that constant, frequent exposure to antibiotics will result in the formation of super-bugs, or taking copious amounts of paracetamol will fry your liver-, so if you know lesser, than yeah drugs are more harmful than previously thought, but I already think that they are plenty harmful, so in my opinion, no.
Plus, could it just be that he didn't recognize the song to have been sang by Aerosmith because of a multitude of other reasons? He may have become so jaded with making the same music that it sounds all the same, or the song may have had been written by a hired songwriter so there is less of an emotional attachment to aid memory retrieval, or perhaps, he was distracted by the thought of his mortal coil and that of the band's longevity?
Also, objectively speaking, yes it is harmful, but the fact that there is still a market for illicit trading, despite prolific members of society having died from consuming such drugs you refer to and the many anonymous who go into the abyss, would suggest that they are not more harmful than thought (hubris is mostly to blame for the belief that the worse will not befall unto them, even though the chemical composition of the drugs that result in deaths or objective harm, eg, heroin suppresses the gagging reflex, exposing users to a likely death by choking on puke, remains unchanged- to include additional risks from unique production methods would be too ambitious for me). That is to say, the dangers of drugs- excluding unique manufacturing methods-, do not fluctuate with what we think; the harmful side effects are unyielding and ever present in every pill.
Most people have a pretty good understanding of how harmful drugs are. Some people, like Steven Tyler who have a serious drug problem, might be a little bit in denial of how bag drugs are for them. But for the most part, most adults have a clear understanding of what happens when you take drugs and why it is important not to abuse them.