WebMD Symptom Checker helps you find the most common symptom combinations and medical conditions related to palpitations (fluttering in chest). Click on the combination that matches your symptoms to find the conditions that may cause these problems.
Nerve agents are a class of phosphorus-containing organic chemicals (organophosphates) that disrupt the mechanism by which nerves transfer messages to organs. The disruption is caused by blocking acetylcholinesterase, an enzyme that normally destroys acetylcholine, a neurotransmitter.
What is Vyvanse (Vivance)? Vyvanse (Vivance) is an amphetamine. Exactly how Vyvanse (Vivance) works is not known. It affects certain chemicals in the brain and nerves that contribute to hyperactivity and impulse control and may help improve attention span and behavior.