Read it through once

MACBETH. Throw physic to the dogs, I’ll none of it. Come, put mine armour on; give me my staff: Seyton, send out.—Doctor, the Thanes fly from me.— Come, sir, despatch.—If thou couldst, doctor, cast The water of my land, find her disease, And purge it to a sound and pristine health, I would applaud thee to the very echo, That should applaud again.—Pull’t off, I say.— What rhubarb, senna, or what purgative drug, Would scour these English hence? Hear’st thou of them?