is another drug that may cause hypersomnolence and microsleeps. Most microsleeps are not clinically significant, however. Individuals who feel sleepy and wish to maintain alertness often consume over-the-counter stimulants such as caffeine in coffee. More specifically, it has been shown that high-frequency low-dose caffeine intake is effective at countering poor work performance effects due to extended wakefulness, confirming the hypothesis that adenosine is a mediator of performance decrements associated with extended wakefulness. Other stimulants that could decrease microsleep frequency include Adderall, amphetamine, cocaine, and tobacco. See also Drowsiness Hypnic jerk Sleep apnea Sleep debt Vigilance References Citations Works cited Sleep Sleeplessness and sleep deprivation sv:Sömn#Mikrosömn