primum non nocere

== Latin == === Pronunciation === (Classical Latin) IPA(key): [ˈpriː.mũː ˈnoːn nɔˈkeː.rɛ] (modern Italianate Ecclesiastical) IPA(key): [ˈpriː.mum ˈnɔn noˈt͡ʃɛː.re] === Phrase === prīmum nōn nocēre First, do no harm (an adage taught to medical students reminding them to consider the possible harm of any intervention).