for example, to take the drug at say, 9 a.m. and then again at 3 p.m., then wait another 18 hours until they take another dose. Why is there so much variation on prescription drug labels?

For example, antacids such as Tums can make many prescription drugs less effective ... or if you end up using it for longer than the label advises, make an appointment with your doctor.

For example, some OTC medications may be gluten-free or sugar ... careful consideration of the active ingredients, dosage form, label information, and any additional features that may be important ...

The US Food and Drug Administration (FDA)’s recently issued final rule establishing application, labeling, and postmarketing reporting ...