Linzess Effects & Side Effects

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared with rates in the clinical trials of another drug and may not reflect the rates observed in practice.

During clinical development, approximately 2570, 2040, and 1220 patients with either IBS-C or CIC were treated with LINZESS for 6 months or longer, 1 year or longer, and 18 months or longer, respectively (not mutually exclusive).

Irritable Bowel Syndrome with Constipation (IBS-C)

Diarrhea

Diarrhea was the most commonly reported adverse reaction of the LINZESS-treated patients in the pooled IBS-C pivotal placebo-controlled trials. In these trials, 20% of LINZESS-treated patients reported diarrhea compared to 3% of placebo-treated patients. Severe diarrhea was reported in 2% of the LINZESS-treated patients versus less than 1% of the placebo-treated patients, and 5% of LINZESS-treated patients discontinued due to diarrhea vs less than 1% of placebo-treated patients. The majority of reported cases of diarrhea started within the first 2 weeks of LINZESS treatment. Fecal incontinence and dehydration were each reported in less than or equal to 1% of patients in the LINZESS treatment group [see Warnings and Precautions (5.2)].

Adverse Reactions Leading to Discontinuation

In placebo-controlled trials in patients with IBS-C, 9% of patients treated with LINZESS and 3% of patients treated with placebo discontinued prematurely due to adverse reactions. In the LINZESS treatment group, the most common reasons for discontinuation due to adverse reactions were diarrhea (5%) and abdominal pain (1%). In comparison, less than 1% of patients in the placebo group withdrew due to diarrhea or abdominal pain.

Adverse Reactions Leading to Dose Reductions

In the open-label, long-term trials, 2147 patients with IBS-C received 290 mcg of LINZESS daily for up to 18 months. In these trials, 29% of patients had their dose reduced or suspended secondary to adverse reactions, the majority of which were diarrhea or other GI adverse reactions.

Other Adverse Reactions

Adverse reactions that were reported in at least 1% and less than 2% of IBS-C patients in the LINZESS treatment group and at an incidence greater than in the placebo treatment group are listed below by body system:

Gastrointestinal Disorders: gastroesophageal reflux disease, vomiting

General Disorders and Administration Site Conditions: fatigue

Other Adverse Events

In placebo-controlled trials in patients with IBS-C, less than 1% LINZESS-treated patients and no placebo-treated patients reported hematochezia; no patient in either treatment group reported melena. Less than 1% of LINZESS-treated and placebo treated patients reported allergic reactions, urticaria, or hives as adverse events.

Chronic Idiopathic Constipation (CIC)

Diarrhea

Diarrhea was the most commonly reported adverse reaction of the LINZESS-treated patients in the two pooled placebo-controlled CIC trials. In these trials, 16% of LINZESS-treated patients reported diarrhea compared to 5% of placebo-treated patients. Severe diarrhea was reported in 2% of the 145 mcg LINZESS-treated patients versus less than 1% of the placebo-treated patients, and 5% of LINZESS-treated patients discontinued due to diarrhea vs less than 1% of placebo-treated patients. The majority of reported cases of diarrhea started within the first 2 weeks of LINZESS treatment. Fecal incontinence was reported in 1% of patients in the LINZESS treatment group, compared with less than 1% in the placebo group. Dehydration was reported in less than 1% of patients in the LINZESS treatment group [see Warnings and Precautions (5.2)].

Adverse Reactions Leading to Discontinuation

In placebo-controlled trials in patients with CIC, 8% of patients treated with LINZESS and 4% of patients treated with placebo discontinued prematurely due to adverse reactions. In the 145 mcg LINZESS treatment group, the most common reasons for discontinuation due to adverse reactions were diarrhea (5%) and abdominal pain (1%). In comparison, less than 1% of patients in the placebo group withdrew due to diarrhea or abdominal pain.

Adverse Reactions Leading to Dose Reductions

In the open-label, long-term trials, 1129 patients with CIC received 290 mcg of LINZESS daily for up to 18 months. In these trials, 27% of patients had their dose reduced or suspended secondary to adverse reactions, the majority of which were diarrhea or other GI adverse reactions.

Other Adverse Reactions

Adverse reactions that were reported in at least 1% and less than 2% of CIC patients in the 145 mcg LINZESS treatment group and at an incidence greater than in the placebo treatment group are listed below by body system:

Gastrointestinal Disorders: dyspepsia, fecal incontinence

Infections and Infestations: viral gastroenteritis

Other Adverse Events

In placebo-controlled trials in patients with CIC, less than 1% of both LINZESS-treated and placebo-treated patients reported rectal hemorrhage, hematochezia or melena. Less than 1% of LINZESS-treated and placebo-treated patients reported allergic reactions, urticaria, or hives as adverse events.

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Linzess Overview

Overall Rating
Medication Type
Prescription
Approval Date
Aug 30, 2012
DEA Schedule
Not Classified

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