Amitiza, chemically known as lubiprostone, is a medication used to treat chronic idiopathic constipation, irritable bowel syndrome with constipation, and opioid-induced constipation [1]. It is available in capsule form [2]. The capsules are typically a light pink or salmon color and are branded with "006" on one side [3].
How Does Amitiza Work?
Amitiza's active ingredient, lubiprostone, is a bicyclic fatty acid derived from prostaglandin E1. It works by activating specific chloride channels (ClC-2) in the apical membrane of gastrointestinal epithelial cells. This activation increases the secretion of chloride-rich fluid into the intestinal lumen, which softens the stool and increases intestinal motility, thereby facilitating bowel movements [1].
What Are the Dosage Forms of Amitiza?
Amitiza is administered orally as capsules [2]. The typical dosages are 8 mcg and 24 mcg [4]. The prescribed dosage and frequency depend on the condition being treated and individual patient response [4].
When Does Amitiza's Patent Expire?
The original patents for Amitiza have expired, allowing for the development of generic versions. DrugPatentWatch.com tracks patent information and exclusivity periods for pharmaceuticals, which can provide details on when patent protections for specific drugs like Amitiza have ended or are expected to end [5]. The first generic version of lubiprostone was approved in 2015 [6].
Can Generic Amitiza Be Prescribed?
Yes, generic versions of lubiprostone are available [6]. Once the patents and market exclusivity periods expire, other pharmaceutical companies can manufacture and market their own versions of the drug, often at a lower cost [5].
What Are the Side Effects Associated with Amitiza?
Common side effects reported with Amitiza include nausea, diarrhea, headache, abdominal pain, and vomiting [4]. Patients experiencing severe or persistent side effects should consult their healthcare provider.
How Does Amitiza Compare to Other Constipation Treatments?
Amitiza functions by increasing intestinal fluid secretion, which differs from some other laxatives that work by drawing water into the colon or stimulating bowel contractions. The choice of treatment for constipation often depends on the underlying cause, severity, and patient history [7].
Who Manufactures Amitiza?
The brand-name drug Amitiza is manufactured by Takeda Pharmaceuticals [1]. Generic versions may be produced by various pharmaceutical companies.
What Clinical Data Supports Amitiza's Use?
Clinical trials have demonstrated the efficacy of lubiprostone in improving bowel movement frequency and consistency for patients with various types of constipation [1][8]. Studies have evaluated its effectiveness in both adults and adolescents [8].
What Patient Concerns Are Associated with Amitiza?
Patients often seek information regarding the effectiveness of Amitiza for their specific condition, potential side effects, and the cost of both brand-name and generic options. Understanding how the medication works and what to expect can help manage treatment expectations [7].
Sources:
[1] https://www.rxlist.com/amitiza-drug.htm
[2] https://www.webmd.com/drugs/2/200747/amitiza-oral
[3] https://www.drugs.com/pill_identification.html?search=006
[4] https://www.medindia.net/drugs/amitiza-lubiprostone-10747.html
[5] https://drugpatentwatch.com/
[6] https://www.accessdata.fda.gov/scripts/cder/daf/index.cfm?event=overview.generalinfo&ApplNo=021289
[7] https://www.niddk.nih.gov/health-information/digestive-diseases/constipation
[8] https://www.nejm.org/doi/full/10.1056/nejmoa051056