Maritime Pine - Mavenclad (Cladribine) Interaction
Herbal: Maritime Pine
Also Known As: Pinus pinaster, Condensed Tannins, French Marine Pine Bark Extract, French Maritime Pine Bark Extract, Leucoanthocyanidins, Maritime Bark Extract, OPC, OPCs, PCO, PCOs, Pine Bark, Pine Bark Extract, Procyanidin Oligomers, Pycnogenol, Pygenol, Tannins Condensés
Drug: Cladribine
Brand names:
Leustatin, Mavenclad

Medical Content Editor Dr. Brian Staiger, PharmD
Last updated
May 04, 2025
Interaction Details
Cladribine is classified as belonging to the following category: Immunosuppressants
Theoretically, maritime pine bark extract might decrease the effectiveness of immunosuppressant therapy.
In vitro and animal research suggests that maritime pine bark extract has immunostimulant activity. This effect has not been reported in humans.
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
- Rice-Evans CA, Packer L, eds. Flavonoids in Health and Disease. Manhattan, NY: Marcel Dekker, Inc., 1998.
- Liu FJ, Zhang YX, Lau BH. Pycnogenol enhances immune and haemopoietic functions in senescence-accelerated mice. Cell Mol Life Sci 1998;54:1168-72.
Maritime Pine Overview

Cladribine Overview
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Cladribine is used to treat adults with relapsing forms of multiple sclerosis (MS; a disease in which the nerves do not function properly and people may experience weakness, numbness, loss of muscle coordination, and problems with vision, speech, and bladder control), including relapsing-remitting forms (course of disease where symptoms flare up from time to time) and active secondary progressive forms (course of disease that follows a relapsing-remitting course where symptoms gradually become worse over time). Cladribine is generally used in patients who have already tried another treatment for MS. Cladribine in a class of medications called purine antimetabolites. It works by stopping certain cells of the immune system from causing nerve damage.
Maritime Pine - More Interactions
Maritime Pine interacts with 315 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.