Hi.. inspiral ( methylphenidate) is a stimulant drug used in the treatment of ADHD to improve attention and concentration. However it is misused by students at the time of examinations by students. However you may experience numerous side-effects, such as hallucinations, anxiety, dry mouth and visual disturbances. Withdrawal symptoms can include fatigue, disturbed sleeping patterns and depression, while incorrect doses can result in cardiovascular failure or lethal seizures. Its not safe to use without doctors supervision. Alternatively you can adopt other healthy non harmful methods to improve concentration.
Next Steps
consult for further evaluation and management