Two of the most popular dietary supplements used for insomnia are: 1  Melatonin, a hormone produced by the brain. You can also buy it as a supplement. 2  Valerian, an herbal sleep remedy. Valerian appears to be safe, and it may improve sleep when taken for a week or two.
The average spell of clinical depression, if left entirely untreated, will last around 8 months. During a depression, the sufferer will normally be convinced that it will never go away, but this is a classic feature of the way depression makes us think.
How long does the flu last? Flu symptoms usually persist for three to five days in people who are otherwise well. However, young children, pregnant women, the elderly, and people with chronic medical problems (like asthma, diabetes, cancer, HIV, and heart disease) may be knocked out for a longer period of time.