Yes, it is possible to become addicted to over-the-counter (OTC) sleeping pills. OTC sleeping pills are usually antihistamines, which can have sedative effects, but they are not specifically designed as sleep aids. Taking these medications in higher doses or for longer than recommended can lead to tolerance, dependence, and addiction. Moreover, some OTC sleeping pills contain diphenhydramine, which is also used in prescription-strength sleep aids and can have similar addictive properties. It is important to follow the instructions on the label and talk to a healthcare provider if you have trouble sleeping.