[Pyrithioxine a new basic treatment of rheumatoid polyarthritis: initial study of 72 cases with a 6-month follow-up].

Pyrithioxine has certain chemical resemblances to penicillamine and is used as original treatment in a series of 72 cases of rheumatoid arthritis over a period of six months in a dose of 600 mgs daily. Results were favourable in 63% of cases with important lowering of the articular index, return to normal of the sedimentation rate and less frequently a reversal of the Waaler-Rose reaction. Secondary complications were essentially muco-cutaneous, sometimes gastric and necessitated stopping treatment in 15% of cases. No other serious side effect has been observed. When compared with penicillamine pyrithioxine would appear less efficacious but better tolerated. The usefulness of this new medicament in the treatment of rheumatoid arthritis needs to be further explored.