Learn about Ongentys drug interactions, including contraindicated MAO inhibitors, medications to use with caution, and food restrictions to follow.
When you're taking Ongentys (Opicapone) for Parkinson's off episodes, knowing which medications, supplements, and foods can interact with it is critical for your safety. Some interactions are dangerous enough to be completely off-limits, while others just require careful monitoring.
This guide breaks down every major interaction you need to know about — organized by severity — so you can have an informed conversation with your doctor and pharmacist.
Ongentys is a COMT inhibitor — it blocks the enzyme that breaks down Levodopa and other catecholamines (a group of chemical messengers including dopamine, norepinephrine, and epinephrine) in your body. This is how it helps your Parkinson's medication work longer.
But this same mechanism means Ongentys can amplify the effects of any medication or substance that affects catecholamines. When you combine Ongentys with certain drugs, the result can be dangerously high blood pressure, rapid heart rate, or unpredictable mood and behavior changes.
These medications must never be taken with Ongentys:
This is the most dangerous interaction. Non-selective monoamine oxidase (MAO) inhibitors combined with Ongentys can cause a life-threatening spike in blood pressure and heart rate. These include:
If you are taking any non-selective MAO inhibitor, your doctor must discontinue it (with an appropriate washout period) before starting Ongentys. There are no exceptions to this rule.
Because Ongentys inhibits COMT — the enzyme that breaks down catecholamines — taking it with drugs that increase catecholamine levels can cause increased heart rate, arrhythmias, and dangerous blood pressure changes. These include:
Make sure every healthcare provider you see — including emergency room doctors, dentists, and anesthesiologists — knows you take Ongentys. This is especially important if you carry an EpiPen or may need emergency treatment.
Unlike non-selective MAO inhibitors, selective MAO-B inhibitors can be used together with Ongentys — but with careful monitoring. These are commonly prescribed for Parkinson's disease:
Your doctor may prescribe both an MAO-B inhibitor and Ongentys as part of your Parkinson's regimen. However, the combination can increase the risk of side effects like dyskinesia, low blood pressure, and hallucinations. Regular monitoring is essential.
Tricyclic antidepressants can interact with Ongentys because they affect norepinephrine levels. If you take any of these, your doctor should monitor you closely:
These antidepressants increase norepinephrine activity, which Ongentys can amplify:
These combinations aren't strictly prohibited, but your doctor should be aware and monitor for signs of elevated blood pressure or heart rate.
Iron supplements may reduce the absorption of Ongentys if taken at the same time. If you need iron, take it at a different time of day — ideally separated by several hours. Since Ongentys is taken at bedtime, taking iron in the morning is a simple solution.
Over-the-counter cold and sinus medications containing pseudoephedrine or phenylephrine can raise blood pressure and heart rate. Combined with Ongentys, these effects may be amplified. Ask your pharmacist about safer alternatives for congestion.
Some herbal products can affect catecholamine levels or blood pressure. Be cautious with:
Always tell your doctor about every supplement you take, even if it seems harmless.
The most important food interaction is timing: Ongentys must be taken on an empty stomach. Do not eat for at least 1 hour before or 1 hour after taking it. Food reduces absorption and can make the medication less effective.
While there's no specific contraindication, alcohol can worsen Ongentys side effects like dizziness, drowsiness, and low blood pressure. If you drink, do so in moderation and be extra careful about falls.
Unlike older MAO inhibitors, Ongentys (a COMT inhibitor) does not typically require a tyramine-restricted diet. However, if you're also taking an MAO-B inhibitor like Rasagiline or Selegiline alongside Ongentys, your doctor may advise caution with high-tyramine foods like aged cheese, cured meats, and fermented products.
Before starting Ongentys, make sure your doctor and pharmacist know about:
Keep a current medication list in your wallet or phone. In an emergency, this information could be lifesaving.
Most people take Ongentys safely alongside their other medications, but the interactions above are real and need to be taken seriously. The absolute rule: never combine Ongentys with non-selective MAO inhibitors. For everything else, communication with your healthcare team is key.
If you have questions about a specific medication combination, don't guess — ask your doctor or pharmacist. For help finding Ongentys at an affordable price, visit Medfinder. And for more on managing your Parkinson's treatment, explore our guides on what Ongentys is and how to save money on it.
You focus on staying healthy. We'll handle the rest.
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