| Code | System | Display |
| 1990745 | http://www.nlm.nih.gov/research/umls/rxnorm | methadone hydrochloride 40 MG Tablet for Oral Suspension [Diskets] |
| 864708 | http://www.nlm.nih.gov/research/umls/rxnorm | methadone hydrochloride 10 MG Oral Tablet [Dolophine] |
| 864712 | http://www.nlm.nih.gov/research/umls/rxnorm | methadone hydrochloride 10 MG Oral Tablet [Methadose] |
| 864720 | http://www.nlm.nih.gov/research/umls/rxnorm | methadone hydrochloride 5 MG Oral Tablet [Dolophine] |
| 864737 | http://www.nlm.nih.gov/research/umls/rxnorm | methadone hydrochloride 5 MG Oral Tablet [Methadose] |
| 864980 | http://www.nlm.nih.gov/research/umls/rxnorm | methadone hydrochloride 40 MG Tablet for Oral Suspension [Methadose] |
| 991149 | http://www.nlm.nih.gov/research/umls/rxnorm | methadone hydrochloride 10 MG/ML Oral Solution [Methadose] |
| 864706 | http://www.nlm.nih.gov/research/umls/rxnorm | methadone hydrochloride 10 MG Oral Tablet |
| 864714 | http://www.nlm.nih.gov/research/umls/rxnorm | methadone hydrochloride 10 MG/ML Injectable Solution |
| 864718 | http://www.nlm.nih.gov/research/umls/rxnorm | methadone hydrochloride 5 MG Oral Tablet |
| 864761 | http://www.nlm.nih.gov/research/umls/rxnorm | methadone hydrochloride 1 MG/ML Oral Solution |
| 864769 | http://www.nlm.nih.gov/research/umls/rxnorm | methadone hydrochloride 2 MG/ML Oral Solution |
| 864826 | http://www.nlm.nih.gov/research/umls/rxnorm | methadone hydrochloride 5 MG/ML Oral Solution |
| 864978 | http://www.nlm.nih.gov/research/umls/rxnorm | methadone hydrochloride 40 MG Tablet for Oral Suspension |
| 864984 | http://www.nlm.nih.gov/research/umls/rxnorm | methadone hydrochloride 20 MG/ML Oral Solution |
| 991147 | http://www.nlm.nih.gov/research/umls/rxnorm | methadone hydrochloride 10 MG/ML Oral Solution |