Salim.. That is untrue... Many people aer perscribed beta and calcium channel blockers on an "as needed basis"
What are you talking about?
No dear u have to take Beta blocker regularly other wise u will go in shock.
I do know that beta blockers are sometimes prescribed on an as-needed basis for symptoms. The symptoms of "sluggishness" typically subside to tolerable levels with continued treatment for most people, though some do have difficulty tolerating them. I'd suggest that she ask her doctor if there are alternatives to managing her SVT, there usually are.