Alternatives to Linzess If You Can't Fill Your Prescription

Living with irritable bowel syndrome with constipation (IBS-C) or chronic idiopathic constipation (CIC) is difficult enough without the added stress of not being able to fill your Linzess prescription. Whether your pharmacy doesn't have it in stock, your insurance won't cover it, or the cost is too high, you deserve to know your options. Here are the most effective FDA-approved alternatives to Linzess.

What Is Linzess and Why Do Patients Need Alternatives?

Linzess (linaclotide) is a guanylate cyclase-C (GC-C) agonist approved for IBS-C in adults and children 7 and older, CIC in adults, and functional constipation in children 6 and older. It works by activating GC-C receptors in the intestine, increasing fluid secretion and speeding up bowel movements. Patients look for alternatives primarily because of cost (retail price $680–$736/month), insurance coverage barriers, or side effects such as severe diarrhea.

1. Trulance (Plecanatide) — Same Drug Class as Linzess

Trulance (plecanatide) is in the same drug class as Linzess—both are GC-C agonists—and is FDA-approved to treat CIC and IBS-C in adults. A major advantage of Trulance over Linzess is that it can be taken with or without food, whereas Linzess must be taken on an empty stomach at least 30 minutes before a meal.

A large comparative study found similar effectiveness and safety between Trulance and Linzess for CIC and IBS-C, and the American College of Gastroenterology recommends both drugs. Some patients find Trulance causes less diarrhea. However, because it's also brand-name only, cost may be similarly high.

Best for: Adults with IBS-C or CIC who prefer flexible dosing timing or experience excessive diarrhea with Linzess.

Note: Since Trulance is also a GC-C agonist, it may not be suitable if you had an allergic reaction to Linzess.

2. Amitiza (Lubiprostone) — Generic Available, Lower Cost

Amitiza (lubiprostone) belongs to a different drug class—it's a chloride channel activator—and has been available since 2006. Unlike Linzess and Trulance, a generic version of lubiprostone is now available, making it significantly more affordable. Generic lubiprostone can cost $50–$200 per month, compared to $680+ for brand Linzess.

Amitiza is FDA-approved for CIC in adults, IBS-C in adult women (not men), and opioid-induced constipation. The most common side effect is nausea, which some patients find more bothersome than Linzess's diarrhea side effect. It's taken twice daily with food and water.

Best for: Adult women with IBS-C or anyone with CIC who needs a more affordable option. Not approved for IBS-C in men.

3. Motegrity (Prucalopride) — Different Mechanism, Generic Available

Motegrity (prucalopride) is a 5-HT4 receptor agonist—it works by stimulating serotonin receptors in the gut to increase intestinal movement. It's FDA-approved for chronic idiopathic constipation (CIC) in adults. While not specifically approved for IBS-C, some gastroenterologists prescribe it off-label when slow motility is the primary issue.

An important safety note: Motegrity carries a warning about monitoring for worsening depression or suicidal thoughts. Patients and caregivers should be aware of this possibility. A generic version of prucalopride is available, helping keep costs down.

Best for: Adults with CIC, particularly when slow gut motility is the dominant symptom and where cost is a concern.

4. Ibsrela (Tenapanor) — For IBS-C Specifically

Ibsrela (tenapanor) works through a completely different mechanism—it's a sodium/hydrogen exchanger 3 (NHE3) inhibitor that prevents sodium absorption in the gut, increasing water in the intestines and reducing abdominal pain via gut nerve effects. It's approved specifically for IBS-C in adults and is taken twice daily before meals.

Ibsrela is brand-name only and not approved for CIC or for use in children. It tends to be prescribed when patients haven't responded well to Linzess or Trulance, or when its unique mechanism may be better suited to a patient's specific symptoms.

Best for: Adults with IBS-C who have not responded to or tolerated Linzess or Trulance.

Quick Comparison of Linzess Alternatives

Here's a side-by-side snapshot:

• Trulance: Same class as Linzess, once daily, with or without food, adults only, brand-name only
• Amitiza (generic lubiprostone): Different class, twice daily with food, generic available ($50–$200/mo), IBS-C for women only
• Motegrity (generic prucalopride): Different class (5-HT4), once daily, CIC only, generic available
• Ibsrela: Different class (NHE3), twice daily, IBS-C adults only, brand-name only

How to Switch From Linzess to an Alternative

Always talk to your doctor before switching medications. Bring a list of the alternatives above to your next appointment. Your doctor or gastroenterologist can help you choose the best option based on your specific diagnosis (IBS-C vs. CIC), sex, other medications, and insurance coverage. Switching is typically straightforward since these medications all work locally in the gut.

Still Need to Find Linzess?

If you'd prefer to stay on Linzess and simply need help locating it, medfinder can call pharmacies near you to find which ones have Linzess in stock and can fill your prescription. Results are texted directly to you.