Syrian Rue - Ongentys (Opicapone) Interaction
Herbal: Syrian Rue
Drug: Opicapone
Brand names:
Ongentys

Medical Content Editor Dr. Brian Staiger, PharmD
Last updated
May 04, 2025
Interaction Details
Opicapone is classified as belonging to the following category: Dopamine Agonists
Theoretically, Syrian rue might increase the adverse effects of dopamine agonists.
Syrian rue contains the constituent harmine. Animal research shows that harmine increases extracellular dopamine levels. The clinical significance of this effect is unclear.
Interaction Rating
Likelihood of Occurrence
PossibleInteraction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
References
- Iurlo, M., Leone, G., Schilstrom, B., Linner, L., Nomikos, G., Hertel, P., Silvestrini, B., and Svensson, H. Effects of harmine on dopamine output and metabolism in rat striatum: role of monoamine oxidase-A inhibition. Psychopharmacology (Berl) 2001;159(1
Opicapone Overview
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Opicapone is used along with levodopa and carbidopa (Sinemet, Rytary) to treat the end-of-dose 'wearing-off' symptoms of Parkinson's disease. Opicapone is an inhibitor of catechol-O-methyltransferase (COMT). Opicapone helps the levodopa and carbidopa work better by allowing more of it to reach the brain, where it has its effects.
Syrian Rue - More Interactions
Syrian Rue interacts with 1081 drugs
Interaction Rating Key
These severity listings are for informational use only. Never start, stop or otherwise change your therapy before speaking with your provider.
Major | The combined use of these agents is strongly discouraged as serious side effects or other negative outcomes could occur. |
Moderate | Use cautiously under the care of a healthcare professional or avoid this combination. A significant interaction or negative outcome could occur. |
Minor | Be aware that there is a chance of an interaction. Watch for warning signs of a potential interaction. |
Unknown | No interactions have been reported or no interaction data is currently available. |
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DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
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Drug descriptions are provided by MedlinePlus.