Methotrexate (MTX) is the first-line treatment for rheumatoid arthritis (RA). Poor adherence of this treatment decreases the control of the disease and the effectiveness of the associated treatments.

The aim would be to study the observance of patients with RA and to be able to propose adequate solutions favoring patient compliance and thus the stability of the pathology.

For this purpose, 3 methods of communication have been put in place to encourage adherence: usual care by the rheumatologist, sms sending or pharmaceutical maintenance.

Inclusion Criteria:

• Adult patients attending Day Hospital or consultation of rheumatology with rheumatoid polyarteritis and under treatment with MTX alone or in combination with another therapeutic, fixed dosage for at least 3 months.
• Consenting Patient
• Literate French-speaking patient,
• Patient with a mobile phone
• Patient affiliated to a social security scheme

Exclusion Criteria:

• Patient not managing his own treatment