FDA Guidance on Adverse Reactions Section of LabelingSection IV. (D)
Avoiding Nonspecific Terms In characterizing overall adverse reaction experience, nonspecific terms that lack a commonly understood or precise meaning are discouraged, as use of such terms can be misleading. For example, the phrase well-tolerated is a vague and subjective judgment about a drug’s adverse reaction profile for which there are no commonly understood parameters. In addition, the terms rare, infrequent, and frequent do not provide meaningful information about the frequency of occurrence of adverse reactions.
https://www.fda.gov/media/72139/download
It would be much better if ONCY avoided using the term "well tolerated" in future press releases.