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.
Two kinds of medicines are used to treat migraines: 1  Medicines to stop a migraine. These are sometimes called abortive medicines. 2  Medicines to prevent migraines. These drugs are often called preventive medicines.