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.
Belladonna is one of the best homeopathic medicines for migraine treatment. In my clinical practice I have seen huge number of migraine cases recovering wonderfully with the use of Belladonna. The highlighting feature for using Belladonna in migraine is headache of severe, throbbing, bursting nature.