It would be difficult to live a lifetime, or even a year, without at some point needing pharmaceutical drugs. Pharmaceutical drugs can be classified as a chemical compound developed to treat medical conditions, prevent medical conditions, or promote better health. Pharmaceutical drugs can be purchased over the counter or, in many cases, must be prescribed by a doctor.

Pharmaceutical drugs sold over-the-counter are widely available to consumers. These medications are typically mild and not considered a risk for accidental (or intentional) misuse. Pain medications for headaches, light body aches and fevers are available over the counter. Such drugs include Tylenol, Advil, and different forms of aspirin and ibuprofen. Cold medications such as Nyquil, Alka Seltzer, Robitussin and TheraFlu are common pharmaceutical drugs available at most drug stores and grocery stores.

Although pharmaceutical drugs for everyday ailments are available with no special qualifications, some pharmaceutical drugs must be prescribed by a licensed medical doctor. These drugs typically are used for more serious conditions and long term ailments, or have a greater effect on the body than the aforementioned over-the-counter drugs.

In the United States, both over-the-counter and prescription pharmaceuticals must be tested and approved by the Food and Drug Administration (FDA). The FDA ensures that medications on the market are safe for their directed use. Additionally, the International Narcotics Control Board of the United Nations has listed several drugs that are prohibited for sale and consumption.

The pharmaceutical drug industry is large, with many corporations and key players. Some major pharmaceutical companies in the United States are Pfizer, Merck, Eli Lilly, Johnson & Johnson, Bristol-Meyers and Abbott Laboratories. These companies generally send representatives to doctor’s offices and hospitals to educate medical professionals about their product, as well as to persuade their use for their respective patients.