Linzess (Linaclotide)

Constella

Prescription Required
Brand
Dose Size & Price Qty
72mcg
145mcg
290mcg
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Fact Table

Fact Table
Formula C59H79N15O21S6
License FDA approved (2012); EMA approved
Bioavailability <1% (minimal systemic absorption)
Legal status Prescription only (Rx)
Chemical Name Linaclotide, a synthetic 14–amino acid peptide with three disulfide bonds
Elimination half-life Not measurable systemically; locally metabolized in the gastrointestinal tract
Dosage (Strength) 72 mcg, 145 mcg, and 290 mcg oral capsules (once daily)
Pregnancy Category C – Use only if potential benefit justifies potential risk
Brands Linzess (US), Constella (EU)
Protein binding Not applicable (negligible systemic exposure)
PubChem CID 16130478
MedlinePlus a612015
ChEBI 70744
ATC code A06AX04
DrugBank DB08833
KEGG D10073
Routes of administration By mouth (oral capsules)

Linzess (linaclotide) is a prescription medicine used to treat constipation-related bowel problems. It is approved for adults with irritable bowel syndrome with constipation (IBS-C) or chronic constipation, and for children and teens ages 6 to 17 with functional constipation. Linzess works by increasing fluid in the intestines, which softens stools, makes bowel movements easier, and helps reduce stomach pain linked to IBS-C.

Directions

Take Linzess on an empty stomach at least 30 minutes before the first meal of the day. Swallow the capsule whole with water. Don't break, chew, or open it. Take the medication at around the same time each day.

Standard dosing varies by condition:

  • Irritable bowel syndrome with constipation: 290 mcg once daily for adults
  • Chronic idiopathic constipation: 145 mcg once daily for adults, though 72 mcg may be used based on tolerability
  • Functional constipation: Dosage ranges from 72 mcg to 145 mcg once daily, depending on age and weight

For those with trouble swallowing capsules, the capsule can be opened and the contents mixed with applesauce or water. When mixing with applesauce, use 1 teaspoon and swallow it immediately without chewing. When mixing with water, add the contents to approximately 1 ounce of room temperature water, gently swirl for at least 20 seconds, and drink the mixture. It may be recommended to add another ounce of water to the cup, swirl it, and drink it to ensure the full dose is taken.

Linzess should be taken exactly as directed without adjusting the dose unless a healthcare provider recommends it. Store the capsules at room temperature in their original container with the desiccant inside to protect them from moisture.

Ingredients

Linzess contains linaclotide as its active ingredient.

Cautions

  • Before using this medication, you may want to consult a healthcare provider about the following:
    • Any existing health conditions
    • Any allergies
    • A list of all medications currently being taken
  • Linzess should not be used in children under 2 years old because it can cause severe diarrhea and dangerous dehydration, which has been linked to serious harm in very young children.
  • Diarrhea is the most common side effect of Linzess in adults and children, and it can sometimes be severe, especially at higher doses.
  • In rare cases, severe diarrhea has led to dehydration, dizziness, fainting, low blood pressure, or electrolyte problems that required hospitalization or IV fluids.
  • If severe diarrhea happens, Linzess should be stopped right away and fluids should be replaced to prevent dehydration.

Contraindications

Avoid taking or using this medication if any of the following apply:

  • Age under 2 years
  • Known or suspected mechanical gastrointestinal obstruction

Side Effects

Common side effects of Linzess include:

  • Diarrhea
  • Gas
  • Stomach or abdominal pain
  • Abdominal swelling, fullness, or pressure (distention)

Diarrhea is the most common side effect and often starts within the first two weeks of treatment. While it is usually manageable, it can sometimes be severe. Stop taking Linzess and contact your healthcare provider if you develop severe or persistent diarrhea.

More serious symptoms need urgent medical attention. Call your healthcare provider or go to the emergency room if you have severe or unusual abdominal pain, especially if it occurs with bright red blood in the stool or black, tar-like stools.

Frequently Asked Questions about Linzess (Linaclotide)


What is Linzess (linaclotide)?

Linzess is a prescription medication that contains linaclotide and is used to treat certain chronic bowel conditions. It works locally in the intestines to help improve bowel movements and reduce abdominal discomfort.


What conditions is Linzess used to treat?

Linzess is approved to treat irritable bowel syndrome with constipation (IBS-C) and chronic idiopathic constipation (CIC) in adults. These conditions involve ongoing constipation that is not caused by another medical disease.


How does Linzess work in the body?

Linzess increases fluid secretion in the intestines and speeds up the movement of stool through the digestive tract. It also helps reduce pain signals from the gut, which can relieve abdominal pain associated with constipation.


How is Linzess usually taken?

Linzess is typically taken once daily on an empty stomach, at least 30 minutes before the first meal of the day. The capsule should be swallowed whole and not crushed or chewed.


How long does it take for Linzess to start working?

Some people may notice improvement in bowel movements within the first week of treatment. Relief of abdominal pain and bloating may take longer and can continue to improve with consistent use.


What are the most common side effects of Linzess?

The most common side effect is diarrhea, which can sometimes be severe. Other possible side effects include abdominal pain, gas, bloating, and stomach discomfort.


What should I do if Linzess causes severe diarrhea?

If severe or persistent diarrhea occurs, the medication is usually stopped and a healthcare provider should be contacted. Dehydration and dizziness can occur if diarrhea is not addressed.


Who should not take Linzess?

Linzess should not be used in children under 2 years of age due to the risk of serious dehydration. It is also not recommended for people with known or suspected bowel obstruction.


Can Linzess be taken long term?

Linzess may be used long term if it remains effective and well tolerated. Ongoing use should be monitored by a healthcare provider to assess symptom control and side effects.


Does Linzess interact with other medications or foods?

Linzess has minimal drug interactions because it works mainly in the gut and is not significantly absorbed into the bloodstream. Taking it with food may increase the risk of diarrhea, which is why it is recommended on an empty stomach.

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