Medication·Interactions·Reviewed June 9, 2026
Levocetirizine interactions.
Levocetirizine has 3 documented interactions in the NutriStack database. The full interaction list is below. None of this is a substitute for your prescriber's advice.
Levocetirizine at a glance.
A quick, data-grounded summary. The full tables are below.
Levocetirizine has 3 documented interactions in the NutriStack database. The full interaction list is below. None of this is a substitute for your prescriber's advice.
Substances that interact with levocetirizine.
Every supplement and medication in the NutriStack database with a documented interaction with this drug, highest-severity first. Open any pair for the mechanism and sources.
| Substance | Interaction | What happens |
|---|---|---|
| Ashwagandha | Caution | Ashwagandha can be sedating in some users and may add to antihistamine-related drowsiness. |
| L-Theanine | Caution | L-theanine may compound fatigue or reduced alertness from levocetirizine. |
| Melatonin | Caution | Melatonin can add to levocetirizine-related somnolence and next-day impairment. |
The full levocetirizine profile.
Uses, typical dosing, side effects, and the cited evidence for this medication.
Common levocetirizine questions.
Quick answers drawn from the tables above.
What interacts with Levocetirizine?
In the NutriStack database, Levocetirizine has 3 documented interactions. The most notable include Ashwagandha, L-Theanine, and Melatonin. Check any specific combination before taking it and confirm with your prescriber.
Is it safe to take Ashwagandha with Levocetirizine?
NutriStack classifies the Ashwagandha and Levocetirizine pairing as caution: Ashwagandha can be sedating in some users and may add to antihistamine-related drowsiness. Avoid starting high doses when assessing levocetirizine tolerability; stop if excessive sedation occurs. Always confirm with your prescriber.
Check your whole stack
See how levocetirizine fits your supplements.
NutriStack screens your full routine for interactions and depletions, and updates the moment you change it.