Tyrosine

Are there any interactions with medications?

---

Levodopa
Interaction Rating: Moderate Be cautious with this combination.
Talk with your health provider.

Tyrosine might decrease how much levodopa the body absorbs. By decreasing how much levodopa the body absorbs, tyrosine might decrease the effectiveness of levodopa. Do not take tyrosine and levodopa at the same time.

---

Thyroid hormone
Interaction Rating: Moderate Be cautious with this combination.
Talk with your health provider.

The body naturally produces thyroid hormones. Tyrosine might increase how much thyroid hormone the body produces. Taking tyrosine with thyroid hormone pills might cause there to be too much thyroid hormone. This could increase the effects and side effects of thyroid hormones.

Dosing considerations for Tyrosine.

The following doses have been studied in scientific research:

BY MOUTH:

• For improving alertness after being without sleep for a long time: 150 mg/kg/day of tyrosine.
• For PKU: The current recommendation for people with PKU is the incorporation of 6 grams of tyrosine per 100 grams of protein. However, additional separate supplementation with free tyrosine is not recommended because it can produce wide variations in the amount of tyrosine in the blood and could cause unwanted side effects.