 - Unable to abstain from other medications including non-steroidal anti-inflammatory drugs NSAIDS, anti-depressant drugs, anti-histamines and anti-asthma, anti-rhinitis or hay fever medication other than short acting inhaled beta-agonists and paracetamol up to 1g paracetamol per day is permitted for the treatment of minor ailments e.g. headache for 1 week prior to screening and throughout the course of the study. 