Without the medicine Rachelle Crow takes for her rheumatoid arthritis, the 29-year-old Michigan woman’s face would frequently feel as if it were engulfed in flames. She would barely be able to crawl out of bed. She would have trouble opening or closing her fists or lifting her 3-year-old daughter.

Crow can do all those things thanks to Cimzia, one of a highly complex, usually expensive class of drugs known as biologics that derive from living organisms. Cimzia is recommended for women, like Crow, who are trying to get pregnant.

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