633 days, 20 hours, 50 minutes, 19 seconds

She thought she had it down pat: one Glucophage in the morning, one at bedtime = some of the worst migraines she's had. One day off, and just a little headache, easily overlooked. But then, just as her husband suggests maybe only one pill tonight, she gulps two pills and ten minutes later that sharp pain running down the right side of her head again, as if it never left.