Just a few thoughts to add. Living in the Pacific Northwest, home of Starbucks and a bunch more vendors, caffeinism is nearly a way of life. Around here it's

Just a few thoughts to add. Living in the Pacific Northwest, home of Starbucks and a bunch more vendors, caffeinism is nearly a way of life. Around here it's pretty easy to find examples of the effects of overdoing caffeine intake, so my comments are based partly on observation as well as "standard" practice. Caffeine, like all drugs affects people differently and can cause an array of side-effects. , Besides interfering with sleep, a few are worth mentioning. Caffeine can cause increase in gastric reflux or other GI conditions. Anyone who needs "acid reducers" is well-advised to avoid caffeine. Caffeine is also notorious for increasing anxiety symptoms, those prone to panic attacks may be more vulnerable. Cardiac effects are also a potential issue, as caffeine can contribute to abnormally rapid heart rhythms. Naturally as always mileage varies, universal rules don't really exist. If a person has such conditions, no harm in reducing or avoiding caffeine for a while. If the problem improves, then you know what to do, if not, well, resolving the problem is going to require at least a bit more investigation.