Modalert 200 can enhance alertness, focus, and mental endurance, particularly when sleep deprived. Some users think it boosts brain capacity. According to studies, modafinil may improve planning, focus, and response times under specific conditions. It does not, however, boost IQ or total brain capacity in a permanent way. Individual differences exist in the effects, and abuse may result in adverse reactions such as headache, anxiety, nausea, or sleeplessness. Only under medical supervision can Modalert 200 be used due to these hazards. It is better seen as a sleep problem therapy rather than an intellectual treatment.