Can I Take caffeine with l-theanine?

SUMMARY:

No clinically significant interaction is identified in the provided interaction record; the combination is commonly used together and is generally well tolerated. Caffeine is a stimulant and L-theanine is an amino acid that is often taken with caffeine to help reduce jitteriness and support calmer alertness, but individual responses vary.

ADDITIONAL NOTES:

Caffeine: central nervous system stimulant (can cause increased heart rate, blood pressure, anxiety, insomnia). L-theanine: an amino acid with calming/relaxation effects without sedation; often used to mitigate some stimulant side effects. Potential benefits include reduced caffeine-related jitteriness and improved focus. Risks are primarily from caffeine (overstimulation, palpitations) and from high doses or sensitivity; there are no widely reported pharmacokinetic interactions between these two. If you have cardiovascular conditions, anxiety disorders, are pregnant or breastfeeding, or take other stimulants or prescription medications, consult a clinician before combining them.