*Prices reflect U.S. average retail price

Lubiprostone (rINN, marketed under the trade name Amitiza among others) is a medication used in the management of chronic idiopathic constipation, predominantly irritable bowel syndrome-associated constipation in women and opioid-induced constipation... Wikipedia

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Manufacturer's Website: Amitiza                                                                                                                               Average retail cost: $445/month