A common nootropic that contains modafinil, Modalert 200 mg, is used to increase alertness, attention, and productivity.  Although it works well for treating narcolepsy, shift work sleep disorder, and exhaustion from sleep apnea, many individuals are concerned about its long-term safety.

 When used under a doctor's supervision, Modalert 200 is generally well tolerated and regarded as safe in the short term.  But prolonged use necessitates prudence.  Side effects include headaches, nausea, anxiety, sleeplessness, or elevated blood pressure might result from prolonged or unsupervised use.  Modalert is not thought to be physically addictive, but its stimulating effects may cause some users to become psychologically dependent.