Ritalin has a notably calming effect on hyperactive children and a “focusing” effect on those with ADHD. When taken as prescribed, Ritalin is a valuable medicine. Further, research funded by the National Institute of Mental Health has shown that people with ADHD do not get addicted to their stimulant medications at treatment doses.
It is believed that to Ritalin pills online works by activating the brain stem arousal system and cortex. Pharmacologically, it works on the neurotransmitter dopamine, and in that respect resembles the stimulant characteristics of cocaine.
Short-term effects can include nervousness and insomnia, loss of appetite, nausea and vomiting, dizziness, palpitations, headaches, changes in heart rate and blood pressure (usually elevation of both, but occasionally depression), skin rashes and itching, abdominal pain, weight loss, and digestive problems, toxic psychosis, psychotic episodes, drug dependence syndrome, and severe depression upon withdrawal.
Ritalin is a pyrimidine derivative that is structurally related to amphetamine which acts as a central nervous system (CNS) sympathetically stimulant, probably by causing release of nor epinephrine at CNS nerve terminals promoting neurotransmitter. Ritalin may also affect dopamine neurotransmitter. Therapy with Ritalin has been shown to increase cognitive abilities and improve psychological functioning and performance in children and adults with suspected attention deficit disorders. However, Ritalin users have also reported: