My mum is 65 years old and has been experiencing lack of sleep at night for about 3-4 years. She would drop off to sleep but never have any sound sleep as she would hear everything happening at night and had difficulty falling asleep after getting up at night. She now takes a drink of Horlicks every night and sleeps quite soundly that I have to wake her up in the morning. She gets up in the early hours of the morning to go to the toilet then drops back to sleep quite soundly that she can't hear my radio playing music in the morning. She started with 4 teaspoons of horlicks in a cup of milk as the label states but now sleeps even with taking one teaspoon. She also uses the light, medium and strong types and they all work the same. On the nights she doesn't take horlicks, she doesn't sleep. What I can't understand is that she used to take vitamin B complex tablets, which horlicks is mainly made of, every night but never slept. Does anybody know of any side effects for long term usage of horlicks?