anti-histamines are most commonly used for allergies such as benadryl, but is often found in OTC sleep aids,
and some older anti-histamines have anxiolytic effects,
and many other uses. Taking
nyquil every so often will help you get to sleep and stay a sleep due to a cold or irritation, but its not relally useful for insomnia. theres where more prescription sleepaids come into the mix, but enough rambling, your body will still burn calories while you sleep if you take nyquil...