Trouble sleeping? Sleep aids like melatonin and diphenhydramine are short-term solutions to the occasional bout of insomnia. You’ll find sleep aids for both adults and children in many forms, including gummies, pill tablets, liquid capsules, and liquid medications. While melatonin is the most common over-the-counter sleep aid, other drugs like diphenhydramine (Benadryl) and doxylamine succinate (Unisom SleepTabs) act as sedative antihistamines, which can also help you get to bed faster. Before taking any sleep aids, be sure to speak with your primary care physician for more information and dosage recommendations.