"When you take those medications, they diminish your brain's capacity to produce the normal chemicals that fight pain," said Herzog.
The result is a so-called rebound headache that can strike up to 48 hours later.
"I was pretty much in that pattern," said Nancy Christy, one of Herzog's patients.
Christy suffered crippling migraine headaches for decades but now treats them using a balanced approach that includes medication, proper diet, sleep, stress reduction techniques and headache trigger avoidance.
Herzog said it works.
"You just go along, and you're like, 'Wow! I've had four good weeks.'"