| Isoflurane | 12 NDC codes |
| ISOLEUCINE, LEUCINE, LYSINE ACETATE, METHIONINE, PHENYLALANINE, THREONINE, TRYPTOPHAN, VALINE, ALANINE, ARGININE, ASPARTIC ACID, GLUTAMIC ACID, GLYCINE, HISTIDINE, PROLINE, SERINE, TAURINE, and TYROSINE | 2 NDC codes |
| ISOLEUCINE, LEUCINE, LYSINE ACETATE, METHIONINE, PHENYLALANINE, THREONINE, TRYPTOPHAN, VALINE, ALANINE, ARGININE, ASPARTIC ACID, GLUTAMIC ACID, HISTIDINE, PROLINE, SERINE, N-ACETYLTYROSINE, and GLYCINE | 2 NDC codes |
| ISOLEUCINE, LEUCINE, LYSINE ACETATE, METHIONINE, PHENYLALANINE, THREONINE, TRYPTOPHAN, VALINE, CYSTEINE HYDROCHLORIDE, HISTIDINE, TYROSINE, N-ACETYL-TYROSINE, ALANINE, ARGININE, PROLINE, SERINE, GLYCINE, ASPARTIC ACID, GLUTAMIC ACID, and TAURINE | 2 NDC codes |
| isoniazid | 18 NDC codes |
| Isoniazid | 16 NDC codes |
| ISONIAZID | 3 NDC codes |
| Isopropanol and Compound double-stranded quaternary ammonium salts | 1 NDC codes |
| isopropyl alcohol | 25 NDC codes |
| Isopropyl alcohol | 116 NDC codes |
| Isopropyl Alcohol | 326 NDC codes |
| ISOPROPYL ALCOHOL | 123 NDC codes |
| Isopropyl alcohol 50 % | 1 NDC codes |
| Isopropyl Alcohol 50% | 1 NDC codes |
| Isopropyl alcohol 50 % Wintergreen | 1 NDC codes |
| Isopropyl alcohol 70 % | 1 NDC codes |
| Isopropyl alcohol 70% | 1 NDC codes |
| Isopropyl Alcohol 70% | 2 NDC codes |
| Isopropyl alcohol(70%conc.) | 2 NDC codes |
| Isopropyl alcohol 70 % Wintergreen | 1 NDC codes |
| ISOPROPYL ALCOHOL 94.998% GLYCERIN 5% | 1 NDC codes |
| Isopropyl Alcohol 99% | 2 NDC codes |
| isopropyl alcohol cloth | 12 NDC codes |
| Isopropyl Alcohol Cloth | 1 NDC codes |
| Isopropyl Alcohol, Cotton Swab | 1 NDC codes |
| isopropyl alcohol patch | 1 NDC codes |
| Isopropyl Alcohol Spray | 1 NDC codes |
| Isopropyl Alcohol, Wipe | 2 NDC codes |
| Isopropyl Alcohol Wipes | 1 NDC codes |
| Isopropyl Alcohol with Wintergreen 50% | 1 NDC codes |
| Isopropyl Alcohol with Wintergreen 70% | 1 NDC codes |
| Isopropyl Rubbing Alcohol | 6 NDC codes |
| isoproterenol hydrochloride | 5 NDC codes |
| Isoproterenol hydrochloride | 1 NDC codes |
| Isoproterenol Hydrochloride | 29 NDC codes |
| Isoprpoyl Alcohol | 2 NDC codes |
| isosorbide dinitrate | 23 NDC codes |
| Isosorbide dinitrate | 15 NDC codes |
| Isosorbide Dinitrate | 24 NDC codes |
| isosorbide dinitrate and hydralazine hydrochloride | 2 NDC codes |
| Isosorbide dinitrate and hydralazine hydrochloride | 1 NDC codes |
| ISOSORBIDE DINITRATE, DILUTED | 1 NDC codes |
| isosorbide mononitrate | 7 NDC codes |
| Isosorbide Mononitrate | 37 NDC codes |
| ISOSORBIDE MONONITRATE | 22 NDC codes |
| Isosulfan blue | 1 NDC codes |
| Isosulfan Blue | 14 NDC codes |
| ISOSULFAN BLUE | 1 NDC codes |
| ISOTONIC SODIUM CHLORIDE | 1 NDC codes |
| isotretinoin | 43 NDC codes |