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.
These could include: 1  Antihistamines such as diphenhydramine (BenadrylÂ®) 2  Narcotic pain medication such as morphine, oxycodone (OxyContinÂ®), and hydrocodone (VicodinÂ® and LortabÂ®) 3  Opioid cough medications such as codeine cough syrup. 4  Sleeping medications such as zolpidem (AmbienÂ®)