L-Theanine Drug Interactions

When blood pressure medications or stimulants are taken together with L-theanine, drug interactions could potentially occur. These interactions can increase the risk of low blood pressure and decrease the effectiveness of stimulant medications. To help reduce the chances of developing negative L-theanine interactions, talk to your healthcare provider before taking any other medicines with the amino acid.

 

An Introduction to L-Theanine Drug Interactions

Even though L-theanine (also known as just theanine) is a natural product, it can potentially interact with some medicines. Some of these medicines that may lead to L-theanine drug interactions include:
 

L-Theanine Interactions Explained

The following sections explain in detail the potentially negative interactions that can occur when L-theanine is combined with any of the drugs listed above.
 
Blood Pressure Medications
Theoretically, combining L-theanine with a high blood pressure medication could increase the risk of low blood pressure (hypotension). Although this interaction could potentially be beneficial, it could also be dangerous (if blood pressure is lowered too much). Check with your healthcare provider before combining L-theanine with any blood pressure medicine. It may be especially important to monitor your blood pressure when starting or stopping L-theanine or a blood pressure medication.
 
Stimulants
Theoretically, L-theanine could make stimulant medications less effective. This is less of a concern for stimulants used for non-medicinal purposes.
 
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Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;