Make sure you get the RxNorm Full Monthly Release
https://www.nlm.nih.gov/research/umls/rxnorm/docs/rxnormfiles.html
Make sure your php.ini file allow enough time for large upload
Make sure you get the RxNorm Full Monthly Release
https://www.nlm.nih.gov/research/umls/rxnorm/docs/rxnormfiles.html
Make sure your php.ini file allow enough time for large upload