As required
As required adverb - According to need (physicians use PRN in writing prescriptions).
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Synonyms for As required
If needed and as required are semantically related. In some cases you can replace phrase "If needed" with "As required", this phrases are similar.
If needed
As required and if needed are semantically related. Sometimes you can replace phrase "As required" with "If needed", this phrases are similar.
Mutual synonyms
Cite this Source
If needed and As required. (2016). Retrieved 2026, July 31, from https://thesaurus.plus/related/as_required/if_needed
As required & If needed. N.p., 2016. Web. 31 Jul. 2026. <https://thesaurus.plus/related/as_required/if_needed>.
If needed or As required. 2016. Accessed July 31, 2026. https://thesaurus.plus/related/as_required/if_needed.
Google Ngram Viewer shows how "as required" and "if needed" have occurred on timeline