| Gadoteric acid | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Tetracarboxylic acids and derivatives | Details |
| Iothalamic acid | Organic compounds | Benzenoids | Benzene and substituted derivatives | Benzoic acids and derivatives | Details |
| Ioversol | Organic compounds | Benzenoids | Benzene and substituted derivatives | Benzoic acids and derivatives | Details |
| Ioxilan | Organic compounds | Benzenoids | Benzene and substituted derivatives | Benzoic acids and derivatives | Details |
| Technetium Tc-99m medronate | Organic compounds | Organic acids and derivatives | Organic phosphonic acids and derivatives | Bisphosphonates | Details |
| Technetium Tc-99m oxidronate | Organic compounds | Organic acids and derivatives | Organic phosphonic acids and derivatives | Bisphosphonates | Details |
| Oxygen | Inorganic compounds | Homogeneous non-metal compounds | Other non-metal organides | Other non-metal oxides | Details |
| Protamine sulfate | Organic Compounds | Organic Acids | Carboxylic Acids and Derivatives | Amino Acids, Peptides, and Analogues | Details |
| Sincalide | Organic Compounds | Organic Acids | Carboxylic Acids and Derivatives | Amino Acids, Peptides, and Analogues | Details |
| Sonidegib | Organic compounds | Benzenoids | Benzene and substituted derivatives | Biphenyls and derivatives | Details |
| Uridine triacetate | Organic compounds | Nucleosides, nucleotides, and analogues | Pyrimidine nucleosides | Not Available | Details |
| Water | Inorganic compounds | Homogeneous non-metal compounds | Homogeneous other non-metal compounds | Not Available | Details |
| Iron sucrose | Organic compounds | Organic oxygen compounds | Organooxygen compounds | Carbohydrates and carbohydrate conjugates | Details |
| Ferric pyrophosphate | Inorganic compounds | Mixed metal/non-metal compounds | Transition metal oxoanionic compounds | Transition metal pyrophosphates | Details |
| Florbetaben F-18 | Organic compounds | Phenylpropanoids and polyketides | Stilbenes | Not Available | Details |
| Florbetapir F-18 | Organic compounds | Benzenoids | Benzene and substituted derivatives | Styrenes | Details |
| Flutemetamol (18F) | Organic compounds | Organoheterocyclic compounds | Benzothiazoles | Not Available | Details |
| Nitrogen | Inorganic compounds | Homogeneous non-metal compounds | Other non-metal organides | Other non-metal nitrides | Details |
| Sodium chloride | Inorganic compounds | Mixed metal/non-metal compounds | Alkali metal salts | Alkali metal chlorides | Details |
| Sodium citrate | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Tricarboxylic acids and derivatives | Details |
| Helium | Inorganic compounds | Homogeneous non-metal compounds | Homogeneous noble gases | Not Available | Details |
| Iopromide | Organic compounds | Benzenoids | Benzene and substituted derivatives | Benzoic acids and derivatives | Details |
| Carbon dioxide | Inorganic compounds | Homogeneous non-metal compounds | Other non-metal organides | Other non-metal oxides | Details |
| Technetium Tc-99m tetrofosmin | Organic compounds | Organophosphorus compounds | Organic phosphines and derivatives | Not Available | Details |
| Technetium Tc-99m disofenin | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogues | Details |
| Technetium Tc-99m pyrophosphate | Inorganic compounds | Mixed metal/non-metal compounds | Transition metal oxoanionic compounds | Transition metal pyrophosphates | Details |
| Etizolam | Organic compounds | Organoheterocyclic compounds | Thienodiazepines | Not Available | Details |
| Dosulepin | Organic compounds | Organoheterocyclic compounds | Benzothiepins | Dibenzothiepins | Details |
| 4-Phenylfentanyl | Organic compounds | Organoheterocyclic compounds | Piperidines | Fentanyls | Details |
| 3-Allylfentanyl | Organic compounds | Organoheterocyclic compounds | Piperidines | Fentanyls | Details |