Diphenhydramine is an antihistamine used to relieve symptoms of allergy, hay fever, and the common cold. These symptoms include rash, itching, watery eyes, itchy eyes/nose/throat, cough, runny nose, and sneezing. It is also used to prevent and treat nausea, vomiting and dizziness caused by motion sickness. Diphenhydramine can also be used to help you relax and fall asleep.
Block out unwanted noises. Noise can impact your ability to get to sleep as well as your overall sleep quality. Try listening to a radio program or podcast that's not too engaging to help block out noise distractions such as traffic, as well as worrisome thoughts. Listen to something that is soft-spoken instead of loud, and something you enjoy but not so much that you will stay up just to listen to it. Recommended podcasts include: 
Did you know your internal body temperature is integral to regulating your biological body clock? When you’re falling asleep, your body temperature drops slightly, which some experts believe actually helps the process along, according to the Harvard Medical School. The National Sleep Foundation recommends a bedroom temperature of 60 to 67 degrees F for the most sleep-friendly conditions.
Chang, A. M., Aeschbach, D., Duffy, J. F., & Czeisler, C. A. (2015, January 27). Evening use of light-emitting eReaders negatively affects sleep, circadian timing, and next-morning alertness. Proceedings of the National Academy of Sciences, 112(4), 1232–1237. Retrieved from http://www.pnas.org/content/pnas/112/4/1232.full.pdf?__hstc=93655746.972fdd7a7debc8575bac5a80cf7e1683.1477353600071.1477353600072.1477353600073.1&__hssc=93655746.1.1477353600074&__hsfp=1773666937
Natural light is critical for our health and well-being. Bright light therapy, provided by your dermatologist or reputable light box manufacturers online, can reset your body clock by gradually shifting sleep patterns earlier or later, leading to better sleep. Check out these other benefits of light therapy. In a 2004 study, daily use of light-therapy lamps helped insomniacs fall asleep faster and sleep longer. You can also try going outdoors around noon; it will retune your circadian rhythm even if you’re stuck inside for most of the day.
How glycine works: Glycine is considered among the most important amino acids for the body. It exerts widespread influence over our bodies’ systems, structure, and general health, including cardiovascular, cognitive, and metabolic health. Glycine helps the body make serotonin, a hormone and neurotransmitter that has significant effects on sleep and mood.
Leave the distractions at the door and create a bedtime ritual for yourself: darken the shades, take a hot bath, and, most importantly, set a media curfew for yourself so you're not laying in bed looking at your phone for an hour. "Turn off all the screens and sit with a cup of tea or a notebook in dim light," she suggests. Training your body to wind down at the same time every night will help your inner biological clock know when to sleep, and you'll wake up feeling much more refreshed the next day.
How melatonin works: It often surprises people to hear it, but melatonin does not work as a sedative. Melatonin production is triggered by exposure to darkness, and is a powerful bio time regulator. It improves sleep by helping to strengthen the body’s sleep-wake cycles. Stronger sleep-wake cycles translate into a more consistent sleep routine. When your bio clock is in sync, it can help improve your mood, daytime performance, energy levels and your overall health, including immune function, and regulation of metabolism, digestion, and appetite.
Worry Earlier in the Day. When your mind is racing with concerns while you’re trying to fall asleep, that can make it nearly impossible to drift off. Instead, dedicate 15 minutes during the day to process these thoughts. Writing a to-do list or thinking about solutions can be a healthy way to deal with stress and prevent it from interfering with sleep later.
Limit Your Intake Of Caffeine, Alcohol, and Nicotine: Caffeine and nicotine can have a pronounced effect on sleep, causing insomnia and restlessness. In addition to coffee, tea, and soft drinks, look for hidden sources of caffeine such as chocolate, cough and cold medicine, and other over-the-counter medicine. Alcohol consumption can result in nighttime wakefulness.
Having a few drinks before bedtime will increase your NREM sleep (Stages 1 and 2) and reduce your REM sleep. You’ll remember that REM sleep helps you organize and store your memories. Too little REM sleep can be devastating for the brain and body. In addition, REM sleep is the sleep stage where the most calories are burned. And alcohol is filled with empty calories, so drinking is never a good idea when you’re trying to sleep better or lose weight. See more info on REM sleep here.
Alcohol is a known sleep saboteur — it may make you fall asleep, but it disrupts normal sleep cycles, causing you to wake up in the middle of the night. Cherry juice, on the other hand, may help ensure restful slumber, because it’s thought to be naturally high in melatonin, a hormone that helps regulate your body’s sleep-wake cycles. A small study of 11 subjects published in March 2017 in the American Journal of Therapeutics found that participants with insomnia who drank tart cherry juice for two weeks increased the amount they slept. Cherry juice is presumably low risk, but if you have a tendency toward elevated sugar it's best to discuss with your doctor before you start.
Research has shown that changing your lifestyle and sleep habits is the best way to combat insomnia. Even if you decide to use sleeping pills or medications in the short term, experts recommend making changes to your lifestyle and bedtime behavior as a long-term remedy to sleep problems. Behavioral and environmental changes can have more of a positive impact on sleep than medication, without the risk of side effects or dependence.
Evaluate your room. Design your sleep environment to establish the conditions you need for sleep. Your bedroom should be cool – between 60 and 67 degrees. Your bedroom should also be free from any noise that can disturb your sleep. Finally, your bedroom should be free from any light. Check your room for noises or other distractions. This includes a bed partner's sleep disruptions such as snoring. Consider using blackout curtains, eye shades, ear plugs, "white noise" machines, humidifiers, fans and other devices.
Are you physically uncomfortable? A too soft or too firm mattress, an uncomfortable pillow, or an older, worn-out bed can all impede a good night’s sleep. Check your mattress for signs of wear at least twice a year, and consider new pillows. You may also want to see an osteopathic physician who specializes in osteopathic manipulative therapy. A session or two of this safe and effective sleep aid treatment can be life-changing.
Tell your doctor or pharmacist if you are taking other products that cause drowsiness such as opioid pain or cough relievers (such as codeine, hydrocodone), alcohol, marijuana, drugs for sleep or anxiety (such as alprazolam, lorazepam, zolpidem), muscle relaxants (such as carisoprodol, cyclobenzaprine), or other antihistamines (such as cetirizine, chlorpheniramine).
When you feel stressed or anxious, adrenaline courses through your veins, your heart beats at a rapid rate, and your breathing becomes quick and shallow. So before I get into the specifics behind how the 4-7-8 breathing trick works, I wanted to explain in my own words what it feels like when you try it. To me, the effect of the breathing technique feels almost like a sedative drug, because in order to hold your breath for seven seconds and then to exhale for eight—when your breath is so shallow and short—your body is forced to slow your heart rate. It has no choice. Holding your breath, and then slowly, deliberately exhaling for eight seconds, causes a chain reaction. It feels like going from a mad-dash sprint to a finish line to a slow, leisurely, calming stroll through the park.