 - 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 4 g per day for the treatment of minor ailments eg headache from 14 days before screening until the follow-up visit. 