Luckily, my caffeine-deprivation headaches are just a standard tension headache/possible lead-in to mild migraine for me. But then I have ADD and caffeine has nearly zero effect on my energy levels, etc. It helps me focus my attention a bit better I think.
Shakespeare's most striking departure from Cinthio is the manner of his heroine's death. In Shakespeare, Othello suffocates Desdemona, but in Cinthio, the Moor commissions the Ensign to bludgeon his wife to death with a sand-filled stocking.
Indeed, one could view Romeo and Juliet as a transitional play in which Shakespeare merges the comedic elements perfected in his earlier work with tragic elements he would later perfect in the great tragedies -- Hamlet, Othello, Macbeth, and King Lear.