Non-steroidal anti-inflammatory drugs (NSAID) are the first line treatment for spondylarthritis. NSAIDs are effective when used continuously or on demand, in short or long-term use. An effect on radiologic progression of the spine is still controversial. However, physicians have to be aware of potential cardiovascular, renal or gastro-intestinal secondary effects when prescribing NSAIDs. DMARDs like methotrexate or systemic corticosteroids are generally not recommended for the treatment of spondylarthritis. After NSAIDs failure, a TNF inhibitor can be used. 5 anti-TNF are available in Switzerland and they are all effective in this disease. Before starting an anti-TNF treatment, a screening is mandatory. Patients treated with an anti-TNF must be followed regularly.