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) capsules are indicated for the treatment of Chronic Idiopathic Constipation (CIC) in adults and Opioid-Induced Constipation (OIC) in adults with chronic, non-cancer pain (24 mcg twice daily). The effectiveness in patients with OIC taking diphenylheptane opioids (e.g., methadone) has not been established. AMITIZA is also indicated for Irritable Bowel Syndrome with Constipation (IBS-C) in women ≥ 18 years old (8 mcg twice daily).