OTC drugs are medications that can be purchased without a prescription from drugstores or supermarkets. When taken at the prescribed doses, OTC medications are usually safe. They can be abused much like illegal and pharmaceutical drugs. OTC pharmaceuticals, while less strong than other substances, nonetheless carry the danger of addiction. Nonmedical use of prescription or over-the-counter (OTC) drugs means that the user is taking them for reasons other than those listed in the prescribing literature or on the package label. Abusing these drugs might cause users to experience a euphoric "high" or hallucinations. Abuse is defined as any use that is not recommended. Abuse of these drugs is a global issue.