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By attaching to the transporter, the substitute would block the effects of real cocaine.Anabolic Steroids You may have heard that some athletes use anabolic steroids to gain size and strength.Without the drug, the brain can't send enough dopamine into the receptors to create a feeling of pleasure.If a long-term user of cocaine or crack stops taking the drug, the person feels an extremely strong craving for it, because without it he or she can't feel nearly as much pleasure.Normally, once dopamine has attached to a nerve cell's receptor and caused a change in the cell, it's pumped back to the neuron that released it.But cocaine blocks the pump, called the dopamine transporter.They can also permanently stop bones from growing in teenagers.
Schedule III and IV drugs are available by prescription, may have five refills in 6 months, and may be ordered orally.
Most Schedule V drugs are available over the counter.
Taking drugs by injection can increase the risk of infection through needle contamination with staphylococci, HIV, hepatitis, and other organisms.
Dopamine then builds up in the gap synapse between neurons.
The result: dopamine keeps affecting a nerve cell after it should have stopped.