Oxford Pharmascience Ltd.

This study is to help development of a new version of Ibuprofen, called Ibuprofen-LDH. Ibuprofen-LDH will be used as a treatment for muscular pains, headache, fever etc. This new version of ibuprofen is expected to produce fewer stomach/intestine related side effects when compared to many existing marketed formulations of Ibuprofen.
This study is split into 3 parts. Part A is a 7 way crossover, Part B is a maximum of a 6 way crossover and Part C is a maximum of a 4 way crossover. The size of Parts B & Part C and allocated interventions will be confirmed after review of data from Parts A and/or B respectively.
A total of 30 subjects will take part in the study; 10 per study part.
The key objective is to assess the pharmacokinetics properties of Ibuprofen-LDH, with and without a selection of different excipients. The pharmacokinetic properties will include how quickly the drug is absorbed into the bloodstream and also the maximum concentration of drug that reaches the bloodstream.

The study will compare the study drug to an already marketed formulation of prescription strength ibuprofen (Brufen® the reference product) by looking at how the drug is taken up by the body and also by performing a specialist procedure called an endoscopy (or more specifically, a gastroscopy). The safety and tolerability of the study drug will also be assessed.
The study will consist of 2 parts involving up to 54 healthy male and female subjects. Subjects will be randomly assigned to receive either the study drug or reference product. Part 1 will be a cross over study in which up to 10 subjects will receive a single dose of 800 mg study drug OXP001 or Brufen® on Day 1, then a single dose of 800 mg study drug OXP001 or Brufen® on Day 4. Part 1 will assess bioavailability and involve an interim decision on progression to Part 2. In Part 2, up to 44 subjects will receive a dose of 800 mg OXP001 or Brufen® three times daily for 7 days in order to assess pharmacokinetics and stomach irritation using endoscopy.

Oxford Pharmascience Ltd (the Sponsor) is developing a new naproxen tablet formulation (the study drug, OXP005), for the potential treatment of rheumatic and painful conditions. The study will compare the study drug to an already marketed formulation of prescription strength naproxen (Naprosyn® the reference product) by looking at the relative impact of both products on gastroduodenal (GD) irritation by performing a specialist procedure called an endoscopy (or more specifically, a gastroscopy). The safety and tolerability of the study drug will also be assessed.