 [ Symptoms ] is there a relationship between excessice coffee drinking and high blood pressure  my daughter in law makes 5 6 pots of coffee daily she has high blood pressure and gets headaches is she drinking too much coffee that would cause the elevation in blood pressure she also takes a lot of prescription pain medicine and a sleep medication [ Disease ] caffeine can increase the blood pressure but the effect usually only lasts for a short time experts have yet to make a strong link between caffeine and long term high blood pressure that being said a lot of doctors tell patients that have high blood pressure or heart disease that they should limit their caffeine a boost even a temporary one in blood pressure may not be a good idea on top of already high blood pressure besides coffee caffeine is found in tea energy drinks soft drinks and even in chocolate some headachepain medicines also have caffeine in them your daughter in law should let her doctor know how much coffee she drinks as well as other sources of caffeine in her day too much caffeine is often a cause of sleep problems or can make existing sleep problems even worse hope this helps