Answer:
Rebound headaches are one of the most common
causes of daily headache. They occur when you take a medication for a
headache, the headache goes away and then returns; and you take another
pill and ultimately become dependent on the medication to avoid having
the headache. Instead of taking the medication to get rid of the headache,
you are now in a situation where the absence of the medication causes
the headache. This can be caused by any of the medications used to treat headache, including over-the-counter anti-inflammatory drugs, narcotics, and
anti-migraine medications. The treatment is to wean the patient off the medication.
The mechanism by which rebound headaches occur is in unknown. Some writers have suggested that the body becomes tolerant to the medication, but that
does not explain why so many different types of medication can cause
rebound headaches.
Thank you for your question.