Inclusion Criteria:

• Patients undergoing surgical extraction of a single fully or partially impacted mandibular 3rd molar requiring bone removal.
• Patients experiencing moderate to severe post-operative pain within 6 hours from end of surgery.
• Pre-operative laboratory tests in the reference ranges or without clinically significant abnormalities as judged by the Investigator.

Exclusion Criteria:

• Surgery performed under general anaesthesia, or sedation.
• Complications occurring during the surgical procedure or in the period before randomisation as judged by the investigator.
• Acute local or systemic infection at the time of surgery that could confound the post-surgical evaluation.
• Patients with clinical signs of gastritis, gastro-duodenal ulcer, GI bleeding. Other GI disturbances or disease that in the opinion of the investigator could be negatively affected by the administration of NSAIDs.
• Clinical signs or history of coagulation disorders that could be negatively affected by NSAIDs administration.
• Hepatic or renal impairment.
• Patients with significant cardiac impairment, history of cerebrovascular disease, history or peripheral arterial disease, uncontrolled hypertension.
• Hypersensitivity to diclofenac or other NSAIDs or to one of the study medication components.
• Patients under chronic treatment with topical or systemic analgesics/NSAIDs.
• Patients under treatment with any medication that may affect the treatment efficacy evaluation.
• Patients under treatment with any medication whose concomitant use may be susceptible to interactions with diclofenac or may affect safety.