A modafinil coverup is highly unlikely, as it would require all governments to be corrupt in the same way. It's also an unstable equilibrium. In such a scenario

A modafinil coverup is highly unlikely, as it would require all governments to be corrupt in the same way. It's also an unstable equilibrium. In such a scenario, the first government that fails to suppress the truth gains credibility, and all other governments lose credibility. In other words: each government has an incentive to defect and reveal any health issues related to the drug. Not to mention: studies of modafinil show it has a slight neuroprotective effect.[1] 1. https://www.ncbi.nlm.nih.gov/pubmed/16940766 https://www.ncbi.nlm.nih.gov/pubmed/16940766