Marijuana has absolutely ZERO negative repercussions.
I disagree... I smoked like a chimney for years and got asthma as a result of heavy bong rips and puffing blunts. Physically, smoking stuff is a bit rough on the throat/lungs, although most people won't be affected so much as they probably have more self control than I did.
Everyday for the last year, I've been using proventil inhalers, and another inhalation steroid called Q-Var.
It sucks not being able to smoke anymore. If I just do mild physical activity, my throat starts to wheeze and I run short of breath. I will also wake up from sleep with the same symptoms. Now a days I puff inhalers, not blunts
You will also go through mild withdrawal from marijuana. The biggest symptom is insomnia. Trying to sleep is a bitch when you've depended on it for so long just before bedtime.
I also had bad social anxiety off marijuana, even though I still smoked and went out of the house to go food shopping, go to the mall, or the gym. I just fought against the socially awkward feelings cause I knew it was just in my head and nothing was actually happening. It felt like everyone was looking at you and you were doing something strange. One time I smoked over a gram a day with friends at college and I got really bad anxiety while sober. My forehead would sweat really bad during conversations with people.
Another uncommon side effect was just falling into a panic attack, just over thinking about life's problems and you start to bug out, and your heart starts pounding.
One more embarrassing effect was that smoking would dry out my throat and my voice would crack all the time, no matter how much fluids I drank. But this was worse with cigarettes.
With all these things being said, I still enjoyed the buzz in the right environment!!
As far as the rest of the list goes from the OP, its tough to answer since some of the drugs listed give you physical withdrawal only if you stop taking the drug abruptly. But stopping all of the drugs abruptly wasn't a circumstance as a part of the question.