Ongentys Is a Once-Daily COMT Inhibitor Used to Treat Off Episodes in Parkinson's Disease

Ongentys (Opicapone) is a prescription medication that helps people with Parkinson's disease get more out of their Levodopa/Carbidopa treatment by reducing "off" episodes — those periods when your Parkinson's medication wears off and symptoms like tremor, stiffness, and slow movement return.

If you've been prescribed Ongentys or are researching it, this guide covers everything you need to know: what it is, how to take it, what it costs, and important safety information.

What Is Ongentys?

Here are the key facts:

• Brand name: Ongentys
• Generic name: Opicapone
• Drug class: Catechol-O-Methyltransferase (COMT) inhibitor
• Manufacturer: Neurocrine Biosciences, Inc. (licensed from BIAL-Portela & Ca, S.A.)
• FDA approved: For adjunctive treatment to Levodopa/Carbidopa in Parkinson's disease patients experiencing off episodes
• Controlled substance: No — Ongentys is not a controlled substance
• Available forms: 25 mg and 50 mg oral capsules
• Generic available: No. Patents expire March 31, 2030.

Ongentys belongs to the same drug class as Entacapone (Comtan) and Tolcapone (Tasmar), but it stands out for its once-daily dosing — a significant convenience advantage. To understand how it works at a deeper level, see our guide on Ongentys mechanism of action.

What Is Ongentys Used For?

Ongentys has one FDA-approved use: as an add-on treatment to Levodopa/Carbidopa in adults with Parkinson's disease who experience off episodes.

What are off episodes? When you take Levodopa for Parkinson's, there's a window when the medication is working and your symptoms are controlled — that's "on" time. As the dose wears off, symptoms return. These "off" periods can include:

• Tremor
• Muscle stiffness or rigidity
• Slow movement (bradykinesia)
• Difficulty walking
• Freezing

Ongentys works by blocking the COMT enzyme that breaks down Levodopa in your body. This means more Levodopa reaches your brain, extending your "on" time and reducing off episodes.

Ongentys is not used alone — it's always taken alongside Levodopa/Carbidopa. It does not have any approved off-label uses.

How Is Ongentys Taken?

Taking Ongentys correctly is important for it to work properly:

• Dose: 50 mg once daily (the recommended dose). A 25 mg dose is also available.
• When to take it: At bedtime
• How to take it: On an empty stomach — do not eat for 1 hour before or 1 hour after taking Ongentys
• How to swallow: Swallow the capsule whole. Do not open, crush, or chew.
• Missed dose: If you miss a dose, skip it and take your next dose at the regular time the next day. Do not double up.

The bedtime dosing and empty stomach requirement are key. Food can interfere with how Ongentys is absorbed, reducing its effectiveness. Taking it at bedtime makes the empty stomach requirement easier to manage for most people.

Who Should Not Take Ongentys?

Ongentys is not safe for everyone. Do not take it if you have:

• Are taking non-selective MAO inhibitors (such as Phenelzine or Tranylcypromine) — this combination is contraindicated due to the risk of dangerously high blood pressure and heart rate. See our full guide on Ongentys drug interactions.
• Pheochromocytoma, paraganglioma, or other catecholamine-secreting tumors — Ongentys can worsen these conditions.
• Moderate or severe liver problems — Ongentys is not recommended for these patients.

Tell your doctor about all your medications, supplements, and medical conditions before starting Ongentys. Special populations to note:

• Older adults (65+): No dose adjustment needed, but may be more sensitive to side effects.
• Kidney problems: No dose adjustment needed.
• Pregnancy/breastfeeding: Not studied. Discuss risks and benefits with your doctor.

For a complete list of side effects, see our detailed guide on Ongentys side effects.

How Much Does Ongentys Cost?

Ongentys is a brand-name medication with no generic, so it's not cheap:

• Cash price: $645 to $1,003 per month (30 capsules of 50 mg)
• With insurance: Most commercial plans and Medicare Part D cover Ongentys, typically at Tier 4 (specialty/non-preferred brand). Expect copays of $50-$150+ depending on your plan.
• Prior authorization: Many insurers require it. Some also require step therapy with Entacapone first.

Ways to save:

• Ongentys Savings Program: Eligible commercially insured patients may pay as little as $25 per prescription. Not valid with Medicare, Medicaid, or Tricare.
• INBRACE Support Program: Provides insurance navigation help and prior authorization assistance.
• Patient assistance: Programs through NeedyMeds, RxAssist, and RxHope may help uninsured or underinsured patients.

For a complete breakdown of savings options, see our guide on how to save money on Ongentys.

Final Thoughts

Ongentys is a once-daily option for Parkinson's patients struggling with off episodes on Levodopa/Carbidopa. Its simple dosing schedule — one capsule at bedtime — sets it apart from older COMT inhibitors that require multiple daily doses. While the cost is significant, savings programs can bring it within reach for many patients.

If you're ready to start Ongentys, use Medfinder to find a pharmacy with it in stock near you, and talk to your neurologist about whether it's the right fit for managing your Parkinson's symptoms.