What are adverse events, adverse effects, side effects, and adverse drug reactions?

This article was first published on October 12, 2024, and was expanded on October 13, 2024. If we look at the official, FDA-approved Prescribing Information for any medication, we see a few different terms being used for the undesirable effects of the medication. For example, in the Prescribing Information for esketamine nasal spray (Spravato®), we…