Modalert 200 mg is used in the treatment of narcolepsy. Go as per doctor's advise and ensure to take it at fixed time which is really important. Limit intake of caffeine,  no to alcohol. Also do not stop this medicine as you can get withdrawal symptoms.  Consult your doctor if you still are having any inhibitions about this medicine

I understand your concern. Modalert improves the cognitive ability of a person. It is usually suggested to be taken in the daytime. However more clarity is needed regarding the problem for which you were prescribed the tablet. Appropriate treatment of the condition helps in reducing the dysfunction and your quality of life will improve. Some counselling sessions along with medical help might also be useful for you. I would also be more than happy to help you with that if you are looking for further online clarification. You can directly consult with me through Practo as needed. Online chat consultation is available.