AMITIZA (lubiprostone) 8 mcg capsules twice daily are indicated for the treatment of Irritable Bowel Syndrome with Constipation (IBS-C) in women ≥ 18 years old.
Clinical studies found that AMITIZA provides improvement of global Irritable Bowel Syndrome with Constipation (IBS-C) symptoms.1 Global IBS symptoms were defined as abdominal discomfort/pain, bowel habits, and other IBS symptoms.
Two multicenter, double-blind, randomized, placebo-controlled, 12-week studies of patients with IBS-C were conducted.1,7
Patient population: intent-to-treat
AMITIZA had up to 2x Overall Responder rate vs placebo.1
The 2 randomized, placebo-controlled, double-blinded studies comprised 97 (8.4%) male patients, which is insufficient to determine whether men with IBS-C respond differently to AMITIZA than women.1
During a 4-week randomized withdrawal period following Study 1, patients with IBS-C who received AMITIZA during the 12-week treatment period were re-randomized to receive either placebo or to continue treatment with AMITIZA.1
AMITIZA (lubiprostone) is contraindicated in patients with known or suspected mechanical gastrointestinal obstruction. Patients with symptoms suggestive of mechanical gastrointestinal obstruction should be thoroughly evaluated by the treating healthcare provider (HCP) to confirm the absence of such an obstruction prior to initiating AMITIZA treatment.
Patients taking AMITIZA may experience nausea. Concomitant administration of food with AMITIZA may reduce symptoms of nausea.
Avoid use of AMITIZA in patients with severe diarrhea. Patients should be aware of the possible occurrence of diarrhea during treatment. Instruct patients to discontinue AMITIZA and contact their HCP if severe diarrhea occurs.
Syncope and hypotension have been reported with AMITIZA in the postmarketing setting and a few of these adverse reactions resulted in hospitalization. Most reports occurred in patients taking 24 mcg twice daily. Patients should be aware that the risk of syncope and hypotension may be increased with concomitant diarrhea, vomiting, or use of medications known to lower blood pressure. Inform patients that syncope and hypotension may occur within an hour of the first dose or subsequent doses of AMITIZA and generally resolve prior to the next dose, but may recur with repeat dosing. Instruct patients to discontinue AMITIZA and contact their HCP if these reactions occur.
Dyspnea may occur within an hour of first dose. This symptom generally resolves within three hours, but may recur with repeat dosing. Instruct patients to contact their HCP if dyspnea occurs. Some patients have discontinued therapy because of dyspnea.
In clinical trials of AMITIZA (24 mcg twice daily vs placebo; N=1113 vs N=316, respectively) in patients with CIC, the most common adverse reactions (incidence > 4%) were nausea (29% vs 3%), diarrhea (12% vs 1%), headache (11% vs 5%), abdominal pain (8% vs 3%), abdominal distension (6% vs 2%), and flatulence (6% vs 2%).
In clinical trials of AMITIZA (24 mcg twice daily vs placebo; N=860 vs N=632, respectively) in patients with OIC, the most common adverse reactions (incidence > 4%) were nausea (11% vs 5%) and diarrhea (8% vs 2%).
In clinical trials of AMITIZA (8 mcg twice daily vs placebo; N=1011 vs N=435, respectively) in patients with IBS-C, the most common adverse reactions (incidence > 4%) were nausea (8% vs 4%), diarrhea (7% vs 4%), and abdominal pain (5% vs 5%).
Concomitant use of diphenylheptane opioids (e.g., methadone) may interfere with the efficacy of AMITIZA.
The safety of AMITIZA in pregnancy has not been evaluated in humans. Based on animal data, AMITIZA may cause fetal harm. AMITIZA should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus. Caution should be exercised when AMITIZA is administered to a nursing woman. Advise nursing women to monitor infants for diarrhea.
Reduce the dosage in CIC and OIC patients with moderate and severe hepatic impairment. Reduce the dosage in IBS-C patients with severe hepatic impairment.
AMITIZA (lubiprostone) 24 mcg capsules twice daily are indicated for the treatment of Chronic Idiopathic Constipation (CIC) in adults and Opioid-Induced Constipation (OIC) in adults with chronic, non-cancer pain, including chronic pain related to prior cancer or its treatment who do not require frequent (e.g. weekly) opioid dose escalation. The effectiveness in patients with OIC taking diphenylheptane opioids (e.g., methadone) has not been established. AMITIZA 8 mcg capsules twice daily are also indicated for Irritable Bowel Syndrome with Constipation (IBS-C) in women ≥ 18 years old.
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