In medicine, a side effect is an effect, whether therapeutic or adverse, that is secondary to the one intended; although the term is predominantly employed to describe adverse effects, it can also apply to beneficial, but unintended, consequences of the use of a drug.
This is a problem for people who have frequent, severe headaches<span>. ... Medicines that </span>can<span> cause rebound </span>headaches<span> include: Nonprescription medicines, such as acetaminophen, aspirin, or nonsteroidal anti-inflammatory </span>drugs<span> (NSAIDs). Prescription </span>pain<span> medicines, such as codeine or hydrocodone. Hope this helps :) (Hope everything is okay too!!!)</span>
