Biologics are medicinal substances that are developed using biological processes. Biologics are often used to treat arthritis and psoriasis and as vaccines. Follow the links below to find WebMD's comprehensive coverage about how biologics work, who should and shouldn't use them, side effects, and much more.
Many people with rheumatoid arthritis use combination therapy – taking more than one RA medicine at a time. Here are answers to common questions about using combination therapy to treat RA.
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