Insomnia is a general term referring to any difficulty in falling asleep or staying asleep. Left untreated, it may lead to irritability, memory problems, depression, anxiety, and, in the longer term, to an increased risk of accidents, heart disease, hypertension, diabetes, immune system problems, etc. Insomnia is the most commonly diagnosed sleep disorder – affecting some 30% to 50% of the general population with about 10% of the population suffering from long-standing or chronic insomnia.Insomnia is often a symptom or side-effect of another disease or complaint (such as hyperthyroidism, congestive heart failure, chronic obstructive pulmonary disease, dementia, pain-related conditions, or...