At a membrane potential of about –50 mV, all the fast Na + channels are inactivated
Verapamil also increases the supply of blood and oxygen to the heart and slows electrical activity in the heart to control the
Its oral forms include immediate-release (IR) tablets and extended-release (ER)
Dosage Take as directed Important considerations Alternatives Highlights
Given as initial treatment in patients with: (1) Non-ST elevation acute
Verapamil hydrochloride extended-release tablets, USP is a calcium ion