Sedating antihistamines over the counter
There is no real way to quantify strength among over-the-counter sleep aids; however, the most popular sleep aids include those that contain diphenhydramine, which is an antihistamine that is useful in promoting sleep due to its sedating properties.
Mayo Clinic states that a number of OTC sleep aids contain diphenhydramine, including Unisom Sleep Gels, Tylenol PM and others.
Valerian supplements are a natural type of sleep aid that are derived from the Valerian plant, according to Mayo Clinic.
Certain groups of people, such as the very young, the very old, the very sick, and pregnant and breastfeeding women, are more vulnerable to harm from drugs, including over-the-counter (OTC) drugs.
When such people use drugs, special precautions, which may include a doctor's supervision, should be taken.
To avoid dangerous drug-drug interactions, people should consult a pharmacist or doctor before they take prescription drugs and OTC drugs at the same time.
People who have chronic disorders should also consult a pharmacist or doctor.