The crossword solution for the term 'Drug for Insomniacs' is Ambien, which is a prescription medication used to treat insomnia. It works by slowing down the activity of the brain and nervous system, allowing the user to fall asleep more quickly and stay asleep for longer. Ambien is a sedative-hypnotic drug, meaning it has a calming effect on the body and can help people relax and fall asleep.