Background: Pharmacists contribute to reduce the number of medication errors during medication review. Nevertheless, few French studies report the potential clinical impact of pharmacists' interventions performed after detecting drug-related problems. The objective was to evaluate the clinical relevance of pharmacists' interventions in a rheumatology ward from medical and pharmaceutical perspectives. Method: The analysis was conducted on pharmacists' interventions performed between January 1 and December 31, 2015 in a French teaching hospital. Similar pharmacists' interventions were grouped in one item and they were analysed according to 11 drug categories. The clinical significance of pharmacists' interventions was considered independently by a pharmacist and a rheumatologist using a validated French scale that categorises drug-related problems from minor to catastrophic. The agreement between the two professionals was analysed using the weighted kappa coefficient. Results: Of 1313 prescriptions reviewed, 461 pharmacists' interventions (171 items) were formulated for drug-related problems with an acceptance rate of 67.2%. Of the 418 interventions selected for clinical significance analysis, 235 interventions (56.2%) for the physician and 400 interventions (95.7%) for the pharmacist were at least significant. The two professionals evaluated equally the clinical relevance of 90 items (50.6%). The categories with the most similarities were the analgesics/anti-inflammatory drugs (78.1%), the antidiabetics (75.0%) and the anticoagulants (71.4%). The agreement was estimated by a weighted kappa coefficient of 0.29. Conclusion: This work highlights the positive clinical relevance of pharmacists' interventions in rheumatology and the importance of medico-pharmaceutical collaboration to prevent medication errors.