| Urea Cycle Disorder Agents | Not Available | 4 | 18 | Details |
| Urease Inhibitor | Not Available | 1 | 2 | Details |
| Urease Inhibitors | Not Available | 1 | 2 | Details |
| Ureohydrolases | Not Available | 1 | 0 | Details |
| Uric Acid Transporter 1 Inhibitor | Not Available | 0 | 0 | Details |
| Uric Acid-specific Enzyme | Not Available | 2 | 2 | Details |
| Uricosuric Agents | Gout suppressants that act directly on the renal tubule to increase the excretion of ur... more | 9 | 67 | Details |
| Uridine Diphosphate | A uracil nucleotide containing a pyrophosphate group esterified to C5 of the sugar moiety. | 3 | 17 | Details |
| Uridine Diphosphate Sugars | Nucleotide-sugars such as uridine-diphosphate glucose or UDP-glucose. | 3 | 17 | Details |
| Uridine Phosphorylase, antagonists & inhibitors | Not Available | 2 | 2 | Details |
| Urinary Acidifying Agents | Not Available | 13 | 106 | Details |
| Urinary Alkalinisers | Drugs that increase urinary pH. | 5 | 61 | Details |
| Urokinase-Type Plasminogen Activator, antagonists & inhibitors | Not Available | 3 | 12 | Details |
| Urological Agents | Drugs used in the treatment of urogenital conditions and diseases such as URINARY INCON... more | 23 | 164 | Details |
| Urologicals | Not Available | 41 | 235 | Details |
| Uronic Acids | Acids derived from monosaccharides by the oxidation of the terminal (-CH2OH) group fart... more | 2 | 2 | Details |
| Urotensin receptor antagonists | Not Available | 0 | 0 | Details |
| Uterotonic agents | Drugs that stimulate contraction of the myometrium. They are used to induce LABOR, OBST... more | 14 | 66 | Details |
| Vaccines | Suspensions of killed or attenuated microorganisms (bacteria, viruses, fungi, protozoa)... more | 117 | 6 | Details |
| Vaccines, Attenuated | Not Available | 1 | 0 | Details |
| Vaccines, Conjugate | Not Available | 0 | 0 | Details |
| Vaccines, DNA | Recombinant DNA vectors encoding antigens administered for the prevention or treatment ... more | 1 | 0 | Details |
| Vaccines, Inactivated | Not Available | 2 | 0 | Details |
| Vaccines, Subunit | Not Available | 1 | 0 | Details |
| Vaccines, Synthetic | Small synthetic peptides that mimic surface antigens of pathogens and are immunogenic, ... more | 7 | 0 | Details |