Imidazole-d4 is an isotope-labeled variant of imidazole, which is a heterocyclic aromatic compound. Imidazole molecules serve as inhibitors for acetylcholinesterase (AChEI) and xanthine oxidase (XO) and have been utilized as corrosion inhibitors. They display a range of biological activities, including antifungal, antitubercular, anti-inflammatory, antioxidant, and analgesic properties. Imidazole inhibits platelet microsomes from converting endoperoxides (PGG2 and PGH2) into thromboxane A2. Additionally, imidazole derivatives show inhibitory effects on the SARS-CoV-2 3CLpro enzyme, offering potential for research in Alzheimer’s disease, gout, COVID-19, and thrombotic disorders.