Efficacy of 300 mg Ibuprofen Prolonged-Release Tablets for the Treatment of Pain After Surgical Removal of Impacted Third Molars

Inclusion Criteria

• Is male or female ≥ 18 and ≤ 50 years of age.
• Requires extraction of 2 or more third molars. At least 1 of the third molars must be a fully or partially bone impacted mandibular molar. If only 2 molars are removed, then they must be ipsilateral.
• Experiences moderate to severe pain intensity within 6 hours after surgery, as measured by a numeric rating scale (NRS) score of ≥ 5 on a 0-10 scale.
• Has a body weight ≥ 45 kg and a body mass index (BMI) ≤ 35 kg/m².
• Female subjects of child-bearing potential must have been using an acceptable method of contraception for at least 30 days prior to randomisation and be willing to continue use until at least 48 hours post discharge from the clinic.

To be considered not of child-bearing potential, females must be surgically sterile (defined as bilateral tubal ligation, bilateral oophorectomy, or hysterectomy) or post-menopausal (defined as no menses for 12 months without an alternative medical cause).

• Free of clinically significant abnormal findings as determined by medical history, physical examination, vital signs, laboratory tests and ECG.
• Is able to provide written informed consent.
• Is willing and able to comply with study requirements (including diet and smoking restrictions), complete the pain evaluations, remain at the study site overnight, and return for follow up 7 (± 2) days after surgery (Day 8 ± 2 days).

Exclusion Criteria

• Known hypersensitivity reactions or allergy (e.g., asthma, rhinitis, angioedema or urticaria) in response to nonsteroidal anti-inflammatory drugs (NSAIDs; including ibuprofen), acetylsalicylic acid (aspirin), ingredients of the study drug, or any other drugs used in the study, including anaesthetics and antibiotics that may be required on the day of surgery.
• A history of active or previous peptic ulceration/ haemorrhage, gastrointestinal bleeding or perforation, heart failure, renal or hepatic failure, uncontrolled hypertension, asthma, nasal polyps, or chronic rhinitis.
• Has complications from the tooth extraction or any other clinically significant medical history that, in the opinion of the investigator, would affect the subject's ability to comply or otherwise contraindicate study participation, including but not limited to the following: cardiac, respiratory, gastroenterological, neurological, psychological, immunological, haematological, oncological, or renal disease.
• Has undergone another dental surgery within 60 days prior to the day of surgery.
• A positive urine drugs of abuse screen or alcohol breathalyser test at screening and during the study (with the exception of a positive drugs of abuse screen that is a consequence of permitted prescription medicines).
• If female, has a positive pregnancy test at screening (serum) or on the day of surgery prior to surgery (urine), or is lactating.
• Has known or suspected (in the opinion of the investigator), history of alcoholism or drug abuse within 2 years of screening or evidence of tolerance or physical dependence before dosing with study drug.
• Taking any concomitant medications that might confound assessments of pain relief, such as psychotropic drugs, antidepressants, sedative-hypnotics (other than those permitted for conscious sedation), or other analgesics taken within five times of their elimination half-lives. Selective serotonin reuptake inhibitors (SSRIs) and serotonin and noradrenaline reuptake inhibitors (SNRIs) are permitted if the subject has been on a stable dose for at least four weeks prior to Visit 1 (screening).
• Is considered by the investigator, for any reason (including, but not limited to the risks described as precautions, warnings and contraindications in the current version of the investigator's brochure (IB) for 300 mg ibuprofen PR tablets), to be an unsuitable candidate to receive the study drug.
• Has a history of chronic use (defined as daily use for > 2 weeks) of NSAIDs, opiates, or glucocorticoids (except inhaled nasal ster