NutriStack
Levetiracetam and Vitamin B6, a synergy.
Levetiracetam can cause irritability, agitation, mood changes, or aggression in some people. Pyridoxine (vitamin B6) has clinical evidence as an adjunct that may reduce levetiracetam-associated behavioral adverse effects, especially when the antiseizure benefit of levetiracetam is otherwise good. Evidence is most developed in children and is mixed enough that this should not be treated as a guaranteed fix.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
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At a glance
- Substances
- Levetiracetam and Vitamin B6
- Pair type
- Synergy
- Evidence (highest tier)
- Moderate
- Source citations
- 2 sources
- Stack Score effect
- +2 to your Stack Score (per scored synergy row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Synergy · Moderate evidence
Synergy
What is happening. Levetiracetam can cause irritability, agitation, mood changes, or aggression in some people. Pyridoxine (vitamin B6) has clinical evidence as an adjunct that may reduce levetiracetam-associated behavioral adverse effects, especially when the antiseizure benefit of levetiracetam is otherwise good. Evidence is most developed in children and is mixed enough that this should not be treated as a guaranteed fix.
Mechanism. Vitamin B6 is a cofactor in neurotransmitter synthesis, including GABA, serotonin, dopamine, and norepinephrine pathways. The exact mechanism for improving levetiracetam behavioral symptoms is uncertain, but it may modulate neurochemical effects related to levetiracetam's SV2A-mediated antiseizure activity.
Recommendation. Ask your prescriber whether vitamin B6 is appropriate if levetiracetam is helping seizures but causing new irritability or mood symptoms. Do not use B6 as a substitute for urgent care if depression, suicidality, severe aggression, or psychosis appears. Avoid chronic high-dose B6 unless supervised because excessive doses can cause neuropathy.
Sources (2)
- Mahmoud A, Tabassum S, Al Enazi S, Lubbad N, Al Wadei A, Al Otaibi A, et al. Amelioration of Levetiracetam-Induced Behavioral Side Effects by Pyridoxine. A Randomized Double Blind Controlled Study. Pediatr Neurol. 2021;119:15-21. PMID 33823377
- Besag FMC, Vasey MJ, Sen A. Current evidence for adjunct pyridoxine (vitamin B6) for the treatment of behavioral adverse effects associated with levetiracetam: A systematic review. Epilepsy Behav. 2023;140:109065. PMID 36791631
Stack Score
How this pair moves the number.
Effect on the composite score
If both Levetiracetam and Vitamin B6 are in the same stack, this pair applies +2 to your Stack Score (per scored synergy row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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