In reading the recent question 'WG remission experiences', I wondered why nobody mentioned azathioprine - I was given azathioprine after being informed that being given cyclophosphamide long term caused more problems than it solved.
Not wanting to show my ignorance, I 'Googled' both azathioprine and rituximab which lead me to the RAVE trial - rituxan.com/wg-mpa/hcp/wg-m... - which seems to indicate that rituximab is more successful than cyclophosphamide followed by azathioprine in treating WG and Microscopic Polyangiitis.
However, this website seems to have a commercial interest in rituximab.