February 01, 2026 article Open access Comparative Effectiveness of Single-Dose Epidural Esketamine versus Hydromorphone in Thoracic and Upper Abdominal Surgery: A Randomized Trial Drug Design Development and Therapy DOI: 10.2147/dddt.s580521 Full text (OA) OpenAlex Authors 0 Author list not loaded yet. Cited by 0 stored of 1 References 2 Search Sort Most cited Newest Oldest Patent citations Title Any typearticle review book-chapter conference-paper preprint dissertation book dataset other Any fieldAgricultural and Biological Sciences Arts and Humanities Biochemistry, Genetics and Molecular Biology Business, Management and Accounting Chemical Engineering Chemistry Computer Science Decision Sciences Dentistry Earth and Planetary Sciences Economics, Econometrics and Finance Energy Engineering Environmental Science Health Professions Immunology and Microbiology Materials Science Mathematics Medicine Neuroscience Nursing Pharmacology, Toxicology and Pharmaceutics Physics and Astronomy Psychology Social Sciences Veterinary Open access Opioid-free anesthesia: A systematic review and meta-analysis 2023 Journal of Clinical Anesthesia review Medicine Anesthesia and Pain Management Open access 109 citations Ketamine Psychedelic and Antinociceptive Effects Are Connected 2022 Anesthesiology article Medicine Anesthesia and Sedative Agents Open access 35 citations 2 results