Editing Insomnia (section)

====Caffeine====

Some people experience sleep disruption or anxiety if they consume caffeine.<ref>{{cite journal | vauthors = O'Callaghan F, Muurlink O, Reid N | title = Effects of caffeine on sleep quality and daytime functioning | journal = Risk Management and Healthcare Policy | volume = 11 | pages = 263–271 | date = 7 December 2018 | pmid = 30573997 | pmc = 6292246 | doi = 10.2147/RMHP.S156404 | doi-access = free | title-link = doi }}</ref> Doses as low as 100&nbsp;mg/day, such as a {{cvt|6|oz|g}} cup of coffee or two to three {{cvt|12|oz|g}} servings of caffeinated soft-drink, may continue to cause sleep disruption, among other intolerances. Non-regular caffeine users have the least caffeine tolerance for sleep disruption.<ref name="Caffeinedependence JohnHopkins">{{cite web|url=http://www.caffeinedependence.org/caffeine_dependence.html|title=Information about caffeine dependence|date=9 July 2003|website=Caffeinedependence.org|publisher=Johns Hopkins Medicine|archive-url=https://web.archive.org/web/20120523135807/http://www.caffeinedependence.org/caffeine_dependence.html|archive-date=23 May 2012|url-status=usurped|access-date=25 May 2012}}</ref> Some coffee drinkers develop tolerance to its undesired sleep-disrupting effects, but others apparently do not.<ref name="Fredholm">{{cite journal | vauthors = Fredholm BB, Bättig K, Holmén J, Nehlig A, Zvartau EE | title = Actions of caffeine in the brain with special reference to factors that contribute to its widespread use | journal = Pharmacological Reviews | volume = 51 | issue = 1 | pages = 83–133 | date = March 1999 | doi = 10.1016/S0031-6997(24)01396-6 | pmid = 10049999 }}</ref>