Tyrosine Drug Interactions

If certain medications are taken with tyrosine, drug interactions can possibly occur. These interactions may affect how the medications are absorbed into your bloodstream or compound their effects. Medications that may cause tyrosine drug interactions include those containing levodopa and thyroid medications. To prevent these and other interactions, tell your healthcare provider about all drugs, vitamins, and supplements you take prior to taking tyrosine.

 

An Overview of Tyrosine Drug Interactions

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

Tyrosine Interactions Explained

The following sections explain in detail the potentially negative interactions that can occur when tyrosine is combined with any of the drugs listed above.
 
Medications Containing Levodopa (Parcopa, Sinemet, Sinemet CR, Stalevo)
Tyrosine could decrease the absorption of levodopa into the bloodstream, perhaps making it less effective. In order to avoid this interaction, be sure to separate levodopa and tyrosine dosages by at least two hours.
 
Thyroid Medications
Theoretically, tyrosine and thyroid could have additive effects when taken together. Tyrosine is used by the body to make thyroid hormones. Check with your healthcare provider before combining thyroid medications with tyrosine.
 
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Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;