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.
1 Desdemona tells him to stay, but Cassio feels too weird and hurries out. Thus, Iago begins his make-Othello-jealous campaign by commenting on how weird it is that Cassio hurried off so quickly, like a thief stealing away in the night.  Desdemona jumps right into sweet-talking Othello and campaigning for Cassio.