There are various sampling methods. The one chosen will depend on a number of factors (such as time, money etc.). 1. Random Sampling Everyone in the entire target population has an equal chance of being selected. This is similar to the national lottery.
Various types of medications have been evaluated for migraine prophylaxis, including beta blockers, antidepressants, anticonvulsants, nonsteroidal anti-inflammatory drugs (NSAIDs), angiotensin blockade agents, and calcium channel blockers.
The medications used to treat weather-related migraines are the same as those used to treat other migraine headaches, with the non-steroidal anti-inflammatory drugs (NSAIDs like ibuprofen, naproxen and others) and the triptans (sumatriptan and others) being the most important medications.