Controlled trial of hydroxychloroquine and d‐penicillamine singly and in combination in the treatment of rheumatoid arthritis

1984 
A 2-year, controlled, double-blind trial of D-penicillamine and hydroxychloroquine either alone or in combination was conducted on patients with progressive rheumatoid arthritis. The group given D-penicillamine alone improved most, but a linear fall-off in efficacy occurred. Surprisingly, the group receiving combination drug therapy did not fare as well as the group receiving D-penicillamine therapy. A subset of patients receiving hydroxychloroquine therapy had prolonged benefit. Toxicity, though not uncommon, was generally not severe.
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