| Retinoids for Treatment of Acne | Not Available | 1 | 4 | Details |
| Retinoids for Treatment of Psoriasis | Not Available | 2 | 18 | Details |
| Retroviridae Proteins | Proteins from the family Retroviridae. The most frequently encountered member of this f... more | 2 | 4 | Details |
| Reverse Transcriptase Inhibitors | Inhibitors of reverse transcriptase (RNA-DIRECTED DNA POLYMERASE), an enzyme that synth... more | 34 | 230 | Details |
| Reversed Anticoagulation Activity | Not Available | 3 | 27 | Details |
| Rhamnose, metabolism | Not Available | 1 | 1 | Details |
| Rho Kinase Inhibitor | Not Available | 1 | 3 | Details |
| Rho Kinase Inhibitors | Not Available | 1 | 3 | Details |
| rho-Associated Kinases, antagonists & inhibitors | Not Available | 1 | 2 | Details |
| Rhodiola | Not Available | 0 | 0 | Details |
| Ribofuranil derivatives | Not Available | 0 | 0 | Details |
| Ribonucleoprotein, U1 Small Nuclear | Not Available | 1 | 0 | Details |
| Ribonucleoproteins | Complexes of RNA-binding proteins with ribonucleic acids (RNA). | 1 | 1 | Details |
| Ribonucleoside Diphosphate Reductase, antagonists & inhibitors | Not Available | 1 | 3 | Details |
| Ribonucleosides | Nucleosides in which the purine or pyrimidine base is combined with ribose. (Dorland, 2... more | 79 | 286 | Details |
| Ribonucleotide Reductases, antagonists & inhibitors | Not Available | 2 | 19 | Details |
| Ribonucleotides | Nucleotides in which the purine or pyrimidine base is combined with ribose. (Dorland, 2... more | 75 | 720 | Details |
| Ribosomal Protein S6 Kinases, 70-kDa, antagonists & inhibitors | Not Available | 1 | 1 | Details |
| Ribosome Inactivating Proteins | N-Glycosidases that remove adenines from RIBOSOMAL RNA, depurinating the conserved alph... more | 5 | 0 | Details |
| Ribosome Inactivating Proteins, Type 2 | Ribosome inactivating proteins consisting of two polypeptide chains, the toxic A subuni... more | 4 | 0 | Details |
| Rifamycin Antibacterial | Not Available | 3 | 55 | Details |
| Rifamycin Antimycobacterial | Not Available | 3 | 50 | Details |
| Rifamycins | A group of ANTI-BACTERIAL AGENTS characterized by a chromophoric naphthohydroquinone gr... more | 6 | 75 | Details |
| RNA Caps | Nucleic acid structures found on the 5' end of eukaryotic cellular and viral messenger ... more | 2 | 2 | Details |
| RNA Polymerase I, antagonists & inhibitors | Not Available | 1 | 3 | Details |