I have fast heart rate at rest 120...I took verapamil 80 mg 3 times. For week without any results. Heart rate with little activity 160. any help plz?

Review workup. You must review the cause of your tachycardia and the workup with the physician that prescribed the verapamil. If the rhythm is sinus tachycardia it is secondary to another generally non-cardiac cause (if you have had a normal echocardiogram and EKG as I assume). That non- cardiac cause needs to be addressed and cirrected (? Thyroid; anemia; etc.). You want to treat the cause- not the symptom only.