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.
The average length of depression, if left untreated is 8 months. Depression medication, typically, has to be taken for 6 weeks before it is known if it is effective or not, and then continued for 6 months. Citing relapse as a reason, some treatments recommend a 3 phase approach' which can last well over 2 years.