As with all medications, inform your prescribing doctor about any medical conditions you have and any medications and supplements you are currently taking before starting treatment with levocetirizine. This drug can interact with other medicines and substances, leading to potentially serious side effects.
You should tell your provider if you are taking:
- Central nervous system (CNS) depressants
- Other antihistamines
- CYP3A4 enzyme inhibitors
- St. John’s Wort
- Antiarrhythmic medications
- Cimetidine
- Rifampin
This is not a complete list of all drugs that interact with levocetirizine. Make a comprehensive list of all medicines and supplements that you take before starting treatment with this drug.
You should also tell your health care provider about any medical conditions you manage.
Let your doctor know if you are pregnant or plan on becoming pregnant before starting treatment with levocetirizine. If you become pregnant while taking this medication, stop taking it and inform your health care provider immediately.