Recent News: The Deep. Natalie Farrow was recently cast on Freeform's new pilot The Deep. They are waiting to see if it get's picked up, Catch Natalie Farrow's interview, talking all things iZombie and what it was like to play Ginger.
Caffeine can increase blood pressure; long term consumption at sufficiently high doses has been associated with chronic arterial stiffness. Blood pressure increases are mediated by adenosine receptor antagonism. Caffeine can cause vasoconstriction. It is unclear if caffeine causes increased heart rate as a side effect.
If you're susceptible to the effects of caffeine, just small amounts â even one cup of coffee or tea â may prompt unwanted effects, such as restlessness and sleep problems. How you react to caffeine may be determined in part by how much caffeine you're used to drinking.nd adolescents should limit themselves to no more than 100 mg of caffeine a day. Even among adults, heavy caffeine use can cause unpleasant side effects.