Supplement stacks / L-Theanine + Mirtazapine

Can You Take L-Theanine with Mirtazapine?

L-Theanine is generally considered safe and may help with relaxation, while Mirtazapine is an antidepressant with sedative properties. There are no well-documented interactions between L-Theanine and Mirtazapine, but caution is advised due to the sedative effects of both substances. It is recommended to consult a healthcare provider before combining them.

Safety at a glance
Medium risk
Safety score7/10

Conservative, AI-assisted reading of publicly available medical sources (NIH, Mayo Clinic, WebMD, Examine.com). Informational only — it can't account for your medications, conditions, or genetics.

L-Theanine

Generally safe for most individuals; may cause mild side effects in some cases.

Typical dosage: 100-200 mg daily

Common side effects:
  • Headache
  • Dizziness
  • Gastrointestinal discomfort
Warnings:
  • Consult healthcare provider if taking other sedatives or medications affecting mood.
  • Monitor for increased sedation.
Mirtazapine

Generally well-tolerated; may cause sedation and weight gain.

Typical dosage: Follow manufacturer guidelines; typically 15-45 mg daily

Common side effects:
  • Drowsiness
  • Increased appetite
  • Dry mouth
Warnings:
  • Consult healthcare provider before combining with other sedatives or supplements.
  • Monitor for signs of increased sedation.
Timing

Consider taking L-Theanine in the evening to complement the sedative effects of Mirtazapine, but ensure to consult with a healthcare provider for personalized advice.

Watch out for
  • Consult a healthcare provider before combining L-Theanine with Mirtazapine due to potential additive sedative effects.
Frequently asked questions

Can you take L-Theanine and Mirtazapine together?

L-Theanine is generally considered safe and may help with relaxation, while Mirtazapine is an antidepressant with sedative properties. There are no well-documented interactions between L-Theanine and Mirtazapine, but caution is advised due to the sedative effects of both substances. It is recommended to consult a healthcare provider before combining them.

How safe is the L-Theanine and Mirtazapine combination?

Our analysis of publicly available medical sources scores this combination 7/10 (medium risk). This is an informational estimate, not medical advice — always confirm with a healthcare professional.

When should you take L-Theanine and Mirtazapine?

Consider taking L-Theanine in the evening to complement the sedative effects of Mirtazapine, but ensure to consult with a healthcare provider for personalized advice.

What should you watch out for when combining L-Theanine and Mirtazapine?

Consult a healthcare provider before combining L-Theanine with Mirtazapine due to potential additive sedative effects.

Check your full stack

Taking more than these two? Run your complete supplement list — plus any medications — through the live checker for a combined analysis.

Analyze my stack
Personalize it with your DNA

Genetics change how you process supplements like these. Upload raw 23andMe or Ancestry data for a personalized supplement report.

See the DNA report

Analysis generated August 11, 2026 · Sources include NIH, Mayo Clinic, WebMD, and Examine.com · How our analysis works