Phenelzine-induced pyridoxine deficiency

Area of Science:

• Neuroscience
• Clinical Pharmacology
• Nutritional Psychiatry

Background:

• Phenelzine is a monoamine oxidase inhibitor (MAI) antidepressant.
• Pyridoxine (vitamin B6) is essential for neurotransmitter synthesis.
• Drug-induced nutrient deficiencies can impact patient health.

Purpose of the Study:

• To investigate the relationship between phenelzine use and pyridoxine deficiency.
• To identify clinical symptoms associated with low pyridoxine levels in patients on phenelzine.
• To evaluate the efficacy of pyridoxine supplementation in managing these symptoms.

Main Methods:

• Observational case series involving six patients.
• Assessment of clinical symptoms suggestive of pyridoxine deficiency.
• Measurement of serum pyridoxine levels.
• Monitoring of symptom response to pyridoxine supplementation.

Main Results:

• Six patients on phenelzine presented with symptoms of pyridoxine deficiency.
• Five of the six patients exhibited abnormally low pyridoxine levels.
• All patients experienced symptom resolution upon pyridoxine add-on therapy while continuing phenelzine.

Conclusions:

• Phenelzine treatment is associated with an increased risk of pyridoxine deficiency.
• Clinical monitoring for pyridoxine deficiency is warranted in patients using phenelzine.
• Pyridoxine supplementation is an effective treatment for phenelzine-induced deficiency symptoms.