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1.
Regular use (two or three times a week) builds up tolerance. You still get the buzz but you have to take more of it more often. With greater tolerance comes heftier come-downs. At the peak of cocaine abuse comes a condition known as ‘cocaine psychosis’ which includes such symptoms as aggression and disturbing hallucinations, often of insects under the skin. Regular long term users of cocaine are prone to suffer from permanent psychosis.

Cocaine is extremely habit-forming and you should not over-estimate your ability to handle it.
Until recently, I had not snorted any Coke for at least 25 yrs and I have just now learned that it ceases to be quite so nice after blowing an 8 ball in 2 days. Doing this much, all by myself, was great the first few times I did a line or three, but after a while I was no longer feeling anywhere near the same results as I did with my first two or three lines. It was taking at least twice as much to get the same buzz as I was getting when I did my first LITTLE line. Also, the buzz started ending much sooner than originally and I felt so tired, shaky hands, grinding my teeth, and just wanted to be left alone. I kept thinking that if I just do one more line I will feel better, but this is not the truth once you have begun coke abuse.
by Dr H Post August 12, 2006
 
2.
Regular use (two or three times a week) builds up tolerance. You still get the buzz but you have to take more of it more often. With greater tolerance comes heftier come-downs. At the peak of cocaine abuse is cocaine psychosis.

Cocaine is extremely habit-forming and you should not over-estimate your ability to handle it.
Until recently, I had not snorted any Coke for at least 25 yrs and I have just now learned that it ceases to be quite so nice after blowing an 8 ball in 2 days. Doing this much, all by myself, was great the first few times I did a line or three, but after a while I was no longer feeling anywhere near the same results as I did with my first two or three lines. It was taking at least twice as much to get the same buzz as I was getting when I did my first LITTLE line. Also, the buzz started ending much sooner than originally and I felt so tired, shaky hands, grinding my teeth, and just wanted to be left alone. I kept thinking that if I just do one more line I will feel better, but this is not the truth once you have begun coke abuse.
by Dr H Post August 12, 2006