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.
Anticholinergic drugs are available both over-the-counter and by prescription, as medications used for a variety of symptoms can have this effect. Examples include night-time pain relievers, antihistamines, and other sleep aids, such as: 1  Excedrin PM. 2  Tylenol PM. 3  Nytol. 4  Sominex. 5  Unisom.6  Benadryl.7  Dramamine.nticholinergic drugs are available both over-the-counter and by prescription, as medications used for a variety of symptoms can have this effect. Examples include night-time pain relievers, antihistamines, and other sleep aids, such as: 1  Excedrin PM. 2  Tylenol PM. 3  Nytol. 4  Sominex. 5  Unisom. 6  Benadryl. 7  Dramamine.