Sources

Medicines can come from a variety of sources, including plants, labs, and organisms like fungus. 

Delivery methods

Medicines can be delivered in many ways, such as pills, liquids, creams, gels, ointments, inhalers, patches, and injections. 

Risks

All medicines can cause side effects, and some may not be safe during pregnancy. Taking more than one medicine at the same time can increase the risk of side effects. 

Prescription and over-the-counter

Prescription medicines can only be obtained with a doctor's prescription, while over-the-counter medicines can be purchased without a prescription. 

Generic and brand name

Generic and brand name medicines work the same way, but generic medicines are usually less expensive. 

Pseudoephedrine

Pseudoephedrine is a nasal decongestant found in many over-the-counter cold medicines. It can be used to make methamphetamine, so products containing pseudoephedrine are sold "behind the counter" in many states. 

FDA

The Food and Drug Administration (FDA) ensures that prescription and over-the-counter medicines in the United States are safe and effective.