Serotonin serves as a crucial chemical and neurotransmitter in the body, influencing mood, sleep, digestion, and energy levels. Imbalances in serotonin levels can significantly impact health, prompting doctors to prescribe specific blood or urine tests. The 5-HT test, also known as the Serotonin Test, assesses serotonin levels in the blood, while the 5-HIAA test measures levels in urine. Both tests offer accuracy, yet your doctor may opt for one over the other based on your medical history or lifestyle factors.
Procedures
Preparing for Blood Tests

Describe your symptoms to your doctor. Inform your doctor about any medications you're currently taking and detail the symptoms you're experiencing. Cooperate with any inquiries your doctor makes regarding your overall health.
- Symptoms associated with elevated serotonin levels include diarrhea, nausea, vomiting, restlessness, increased body temperature and heart rate, heightened reflexes, coordination difficulties, hallucinations, skin flushing around the head and neck, and breathing difficulties.

Understanding the Serotonin Blood Test

Providing a Blood Sample for Testing

Waiting for Test Results
Urine Testing Process

Consulting a Doctor Regarding Symptoms

Consult with Your Doctor about Testing

Providing Urine Samples for Testing

Discuss Your Current Medications with Your Doctor

Avoid Certain Foods that Can Affect Test Results

Review Test Results with Your Doctor
Additional Resources
- ↑ Learn more about Serotonin Syndrome
- ↑ Serotonin Syndrome Symptoms and Causes
- ↑ Understanding Carcinoid Tumors
- ↑ Serotonin Blood Test Information
- ↑ Information on 5-HIAA Test
- ↑ Learn more about Carcinoid Syndrome
- ↑ Additional Resources on 5-HIAA Test
- ↑ Information about Foods Affecting 5-HIAA Test.