Introduction
Lynavoy (linerixibat) is a first-in-class, oral ileal bile acid transporter (IBAT) inhibitor approved by the FDA in March 2026. It is specifically indicated for the treatment of cholestatic pruritus (severe itching) in adults with Primary Biliary Cholangitis (PBC). Unlike traditional itching caused by allergies, “liver itch” is caused by a buildup of bile acids in the blood and skin. Lynavoy works by blocking the recycling of these bile acids in the intestine, forcing the body to excrete them and significantly reducing the urge to itch.
Usage and Indications
In the US, Lynavoy is FDA-approved for:
- Cholestatic Pruritus associated with PBC: For adult patients who have not responded adequately to other treatments (like cholestyramine).
- It is the first therapy specifically designed to target the biological pathway of bile-acid-driven itching.
How to Take It (Dosage)
- Form: Oral tablet.
- Frequency: Typically taken twice daily.
- Routine: US pharmacists recommend taking Lynavoy 30 to 60 minutes before breakfast and dinner.
- Administration: Tablets should be swallowed whole with a glass of water.
Side Effects
Because the medication works in the intestines to block bile acid absorption, most side effects are localized to the digestive system:
- Very Common: Diarrhea and abdominal pain.
- Common: Nausea, flatulence (gas), and bloating.
- Nutritional: Potential for decreased absorption of fat-soluble vitamins (A, D, E, and K) with long-term use.
Precautions and Warnings
- Severe Liver Impairment: Patients with advanced cirrhosis (Child-Pugh Class C) should use Lynavoy with extreme caution.
- Gastrointestinal Disorders: Not recommended for patients with existing severe intestinal blockages or inflammatory bowel disease (IBD).
- Dehydration: Due to the risk of diarrhea, US clinicians emphasize maintaining high fluid and electrolyte intake.
Interactions
- Bile Acid Sequestrants: If you take medications like cholestyramine (Questran), take Lynavoy at least 4 hours apart to prevent the drugs from binding to each other.
- Fat-Soluble Vitamins: Your doctor may recommend taking vitamin supplements at a different time of day than your Lynavoy dose.
Storage
- Room Temperature: Store at 68°F to 77°F (20°C to 25°C).
- Moisture Protection: Keep the bottle tightly closed and store in a dry place.
FAQ
- Will Lynavoy cure my liver disease? No. It is specifically approved to treat the itching caused by the disease, not to reverse the liver damage itself.
- How is ‘liver itch’ different from normal itching? Normal itching is often on the surface; liver itch (cholestatic pruritus) often feels like it is “under the skin” and is usually worse at night.
- Why does it cause diarrhea? By blocking bile acid absorption, more bile stays in the intestines, which draws in water and speeds up digestion.
- How soon will the itching stop? Most patients in 2026 clinical trials reported significant relief within 2 to 4 weeks.
- Is it a steroid? No. It is an IBAT inhibitor and does not contain hormones or steroids.
- Will insurance cover Lynavoy? As a 2026 “Orphan Drug” designated therapy, it is covered by most US private insurers and Medicare Part D, though it may require a “Specialty Pharmacy.”
- Can I take it with my other PBC meds? Yes, it is often taken alongside Ursodiol (UDCA) or Ocaliva.
- What if I miss a dose? If it is within 6 hours of your scheduled time, take it. Otherwise, skip it and wait for your next dose.
- Can I take it while pregnant? Data is limited; US doctors recommend discussing the risks and benefits if you are pregnant or breastfeeding.
- Does it help with jaundice? While it lowers bile acids, its primary FDA-approved benefit is for the reduction of pruritus (itch).