For those of us with frequent headaches or Migraine attacks, preventive medications are often a good option. Amazingly, the medications used for this purpose were all originally developed for other conditions then found to be effective as headache and / or Migraine preventives. The discovery is often made when patients taking the medications for their original purpose notice a reduction in the frequency of their headaches or Migraines. The list is ever-evolving. Even as I publish this...