tachycardia
2 interactions related to tachycardia
guarana + caffeine medications
Guarana seeds contain roughly 2-4 times the caffeine concentration of coffee beans, and the caffeine in guarana adds directly to any caffeine-containing medication (e.g., Excedrin, Fioricet, Cafergot, Anacin, Esgic, NoDoz, Vivarin). The combined caffeine load can exceed safe single-dose thresholds, producing tachycardia, hypertension, jitteriness, GI upset, and insomnia.
nicotine + adenosine
Nicotine produces sympathomimetic cardiovascular effects (increased heart rate, blood pressure, peripheral vasoconstriction) and disrupts adenosine A2A receptor-mediated reflex cardiac control, which can blunt or interfere with the diagnostic and therapeutic actions of intravenous adenosine used for supraventricular tachycardia or cardiac stress testing.