Insomnia is a common problem that keeps you awake at night and seriously impacts your mood, energy and the willingness to work. Less sleep at night leads to drowsiness and dizziness the next day and can impair concentration levels and memory. A large number of factors are responsible for poor sleep in individuals, for example, medical and psychiatric reasons, poor sleep environment and the effect of certain medications etc. A person can get a quiet sleep at night by seeking the help of a physician. A patient of insomnia should only buy sleeping pills in London from a trusted pharmaceutical seller.